In planning to mitigate flood, it is essential for engineers to determine the magnitude and frequency of rainfall. The rainfall frequency and magnitude can be determined by rainfall frequency analysis. This study analyzes the regional rainfall frequency of the Samarahan River basin. There are 12 rainfall stations over the 508km2 of basin area, of which 11 are included in this study. The rainfall frequency analyses of each individual station in Samarahan River basin are conducted using Gumbel distribution and Weibull plotting position formulas. The curves that are close to each other are grouped into the same region. Other factors such as topography, station elevation, type of rainfall distribution and isohyet are also considered in determining the region. Subsequently, a regional rainfall frequency map of Samarahan River basin is established. The findings show that Samarahan River basin can be divided into three homogenous regions. In comparison to previous research, there are changes in grouping the rainfall stations selected into regions. These changes may be due to different years of data used and number of rainfall stations selected since the data is limited. Dissimilar outcomes may also be caused by other factors such as nature change over time. This research updates the rainfall analysis of the Samarahan River basin using more adequate data compared to previous research.
{"title":"Regional rainfall frequency analysis for Samarahan river basin","authors":"Dayang Nazihah Abang Uthman, O. S. Selaman","doi":"10.33736/JCEST.442.2017","DOIUrl":"https://doi.org/10.33736/JCEST.442.2017","url":null,"abstract":"In planning to mitigate flood, it is essential for engineers to determine the magnitude and frequency of rainfall. The rainfall frequency and magnitude can be determined by rainfall frequency analysis. This study analyzes the regional rainfall frequency of the Samarahan River basin. There are 12 rainfall stations over the 508km2 of basin area, of which 11 are included in this study. The rainfall frequency analyses of each individual station in Samarahan River basin are conducted using Gumbel distribution and Weibull plotting position formulas. The curves that are close to each other are grouped into the same region. Other factors such as topography, station elevation, type of rainfall distribution and isohyet are also considered in determining the region. Subsequently, a regional rainfall frequency map of Samarahan River basin is established. The findings show that Samarahan River basin can be divided into three homogenous regions. In comparison to previous research, there are changes in grouping the rainfall stations selected into regions. These changes may be due to different years of data used and number of rainfall stations selected since the data is limited. Dissimilar outcomes may also be caused by other factors such as nature change over time. This research updates the rainfall analysis of the Samarahan River basin using more adequate data compared to previous research.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121877274","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Soft soil does not have good soil properties and is not suitable for constructing pavement structures as shear strength is required to resist the shear stress developed by traffic loading. To increase shear strength in this study, lime is used as the soil stabilizing agent and fiber and mesh are used as the soil reinforcement materials. The proper amount of lime added to soil will increase the shear strength as the lime-treated soil will decrease moisture susceptibility and migration. Shear strength of the lime-treated soil can be further improved by adding reinforcement materials such as fiber and mesh. The reinforcement materials will interlock with groups of particles and provide tensile strength to the soil matrix. The type of soil used in this study is high plasticity elastic silt with sand which is classified using the Unified Soil Classification System (USCS). Quicklime (calcium oxide) is used in this study at the minimum amount required for stabilizing the soil, which is 9%. The amount of fiber and mesh added to the soil sample is 0.5% of the dry weight of the soil used. Cylindrical samples were prepared with a moisture content of 22% (OMC) for untreated soil and 21% (OMC) for lime-treated soil samples. The lime-treated soil samples were cured for 7, 14, 28, 56, 90 and 120 days. Unconfined compression tests were conducted to determine unconfined compressive strength (UCS) and stress-strain characteristics. The unconfined compressive strength of the lime-treated samples increased as curing period increased but the failure strain decreased. The UCS and failure strain for reinforced lime-treated soil samples are higher than the unreinforced lime-treated soil samples.
{"title":"COMPARISON OF THE BEHAVIOR OF FIBER AND MESH REINFORCED SOILS","authors":"Y. Fung, S. R. Kaniraj","doi":"10.33736/JCEST.441.2017","DOIUrl":"https://doi.org/10.33736/JCEST.441.2017","url":null,"abstract":"Soft soil does not have good soil properties and is not suitable for constructing pavement structures as shear strength is required to resist the shear stress developed by traffic loading. To increase shear strength in this study, lime is used as the soil stabilizing agent and fiber and mesh are used as the soil reinforcement materials. The proper amount of lime added to soil will increase the shear strength as the lime-treated soil will decrease moisture susceptibility and migration. Shear strength of the lime-treated soil can be further improved by adding reinforcement materials such as fiber and mesh. The reinforcement materials will interlock with groups of particles and provide tensile strength to the soil matrix. The type of soil used in this study is high plasticity elastic silt with sand which is classified using the Unified Soil Classification System (USCS). Quicklime (calcium oxide) is used in this study at the minimum amount required for stabilizing the soil, which is 9%. The amount of fiber and mesh added to the soil sample is 0.5% of the dry weight of the soil used. Cylindrical samples were prepared with a moisture content of 22% (OMC) for untreated soil and 21% (OMC) for lime-treated soil samples. The lime-treated soil samples were cured for 7, 14, 28, 56, 90 and 120 days. Unconfined compression tests were conducted to determine unconfined compressive strength (UCS) and stress-strain characteristics. The unconfined compressive strength of the lime-treated samples increased as curing period increased but the failure strain decreased. The UCS and failure strain for reinforced lime-treated soil samples are higher than the unreinforced lime-treated soil samples.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116260570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Extensive use of metaldehyde to combat agriculture pest creates environmental problems. Not limited to targeted pests, it also endangers non-target groups including the environment, humans and animals. Its solubility in water is capable of polluting drinking water sources and increases cost of water treatment. Despite the low level of concentration, metaldehyde is able to bioaccumulate over time and causes dysfunction in certain organs. Thus, this paper gives a brief view on the toxicity level of metaldehyde and the permissible concentration range of this compound for three different groups namely sediments and plants, water and animals.
{"title":"METALDEHYDE TOXICITY: A BRIEF ON THREE DIFFERENT PERSPECTIVES","authors":"A. Saad, S. Ismail, F. Dahalan","doi":"10.33736/JCEST.444.2017","DOIUrl":"https://doi.org/10.33736/JCEST.444.2017","url":null,"abstract":"Extensive use of metaldehyde to combat agriculture pest creates environmental problems. Not limited to targeted pests, it also endangers non-target groups including the environment, humans and animals. Its solubility in water is capable of polluting drinking water sources and increases cost of water treatment. Despite the low level of concentration, metaldehyde is able to bioaccumulate over time and causes dysfunction in certain organs. Thus, this paper gives a brief view on the toxicity level of metaldehyde and the permissible concentration range of this compound for three different groups namely sediments and plants, water and animals.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116910350","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Md. Jahir Uddin, Prokashon Chakma, S.M. Abdullah Al Faruq
This study investigated the water and bed levels together with thalweg profile variations in graphical and numerical analysis using MS Excel for the Ganges-Padma River between 1996 and 2014 at three different selected stations. It was found that there was no consistency in cross section profiles over the years. The cross section profiles varied rapidly at Mawa and Harding Bridge stations, whereas the changes at Baruria Transit were more consistent comparatively. The mean bed levels at Harding Bridge and Mawa stations gradually rose while at Baruria Transit station, it showed a dynamic behavior. Recently in most cases, the water and bed levels lowered or rose simultaneously, but in the years 1996 to 2009 they showed dissimilar patterns. The maximum water level variation was found at Harding Bridge station at 0.75m (rise). The shifting of thalweg points also varied significantly. The most frequent movement of thalweg vertically was found at Baruria Transit station and horizontally at Mawa station.
{"title":"STUDY OF WATER AND BED LEVEL VARIATION IN THE GANGES-PADMA RIVER, BANGLADESH","authors":"Md. Jahir Uddin, Prokashon Chakma, S.M. Abdullah Al Faruq","doi":"10.33736/jcest.443.2017","DOIUrl":"https://doi.org/10.33736/jcest.443.2017","url":null,"abstract":"This study investigated the water and bed levels together with thalweg profile variations in graphical and numerical analysis using MS Excel for the Ganges-Padma River between 1996 and 2014 at three different selected stations. It was found that there was no consistency in cross section profiles over the years. The cross section profiles varied rapidly at Mawa and Harding Bridge stations, whereas the changes at Baruria Transit were more consistent comparatively. The mean bed levels at Harding Bridge and Mawa stations gradually rose while at Baruria Transit station, it showed a dynamic behavior. Recently in most cases, the water and bed levels lowered or rose simultaneously, but in the years 1996 to 2009 they showed dissimilar patterns. The maximum water level variation was found at Harding Bridge station at 0.75m (rise). The shifting of thalweg points also varied significantly. The most frequent movement of thalweg vertically was found at Baruria Transit station and horizontally at Mawa station.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125975973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the effect of base isolator on the structural responses of multistoried reinforced concrete building under time history earthquake loading. In the present study, six-storied reinforced concrete buildings with both conventional and isolated bases have been modeled. Conventional building has been modeled with fixed support whereas base-isolated building has been modeled incorporating rubber bearing near the base of all columns. Modal analysis has been performed to get an idea of possible mode shapes of the building. After that time history analysis has been performed in order to investigate the effect of seismic loading on the building structure with respect to time. The structural responses of time history analysis such as time period of different modes, storey displacements, storey acceleration, and base shear have been obtained from both conventional and base-isolated buildings. Finally, a comparative study of structural responses has been carried out between those two structures. It has been found that fundamental time period of base-isolated building is increased by 28% compared to conventional building. Moreover, base shear value of the base-isolated structure is reduced by 69% and top storey acceleration is decreased by 75% compared to conventional building. This study reveals that isolation system reduces seismic responses significantly.
{"title":"EFFECT OF BASE ISOLATOR ON THE STRUCTURAL RESPONSE OF REINFORCED CONCRETE MULTISTORIED BUILDING UNDER SEISMIC LOADS","authors":"Z. Tafheem, T. Arafat, A. Chowdhury, A. Iqbal","doi":"10.33736/jcest.378.2017","DOIUrl":"https://doi.org/10.33736/jcest.378.2017","url":null,"abstract":"This study investigates the effect of base isolator on the structural responses of multistoried reinforced concrete building under time history earthquake loading. In the present study, six-storied reinforced concrete buildings with both conventional and isolated bases have been modeled. Conventional building has been modeled with fixed support whereas base-isolated building has been modeled incorporating rubber bearing near the base of all columns. Modal analysis has been performed to get an idea of possible mode shapes of the building. After that time history analysis has been performed in order to investigate the effect of seismic loading on the building structure with respect to time. The structural responses of time history analysis such as time period of different modes, storey displacements, storey acceleration, and base shear have been obtained from both conventional and base-isolated buildings. Finally, a comparative study of structural responses has been carried out between those two structures. It has been found that fundamental time period of base-isolated building is increased by 28% compared to conventional building. Moreover, base shear value of the base-isolated structure is reduced by 69% and top storey acceleration is decreased by 75% compared to conventional building. This study reveals that isolation system reduces seismic responses significantly.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117338184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study explores the concept of utilising roundabout as a component of the urban stormwater system. The research team has developed a drainage model to incorporate a roundabout as dry detention pond. In addition, the model is used to determine the effectiveness of such design by applying the concept virtually on a real-world roundabout at the southeast of UniGarden, a housing estate situated about 17 km from Kuching City of Sarawak. Computer representations of the existing drainage system and roundabout dry detention pond are built using the USEPA SWMM software. The modelling effort shows that the open space provided by a large roundabout is capable of achieving the maximum attenuation of storm flows and is able to hold 100% of runoff from 100-year storm. As empty spaces are increasingly hard to come by in urban areas; therefore, using an open space in a roundabout for dry detention pond is a good example of an innovative drainage system.
{"title":"ALTERNATIVE USE OF ROUNDABOUT AS STORM WATER DETENTION POND","authors":"D. Mah, Tze Yung Ho","doi":"10.33736/JCEST.375.2017","DOIUrl":"https://doi.org/10.33736/JCEST.375.2017","url":null,"abstract":"This study explores the concept of utilising roundabout as a component of the urban stormwater system. The research team has developed a drainage model to incorporate a roundabout as dry detention pond. In addition, the model is used to determine the effectiveness of such design by applying the concept virtually on a real-world roundabout at the southeast of UniGarden, a housing estate situated about 17 km from Kuching City of Sarawak. Computer representations of the existing drainage system and roundabout dry detention pond are built using the USEPA SWMM software. The modelling effort shows that the open space provided by a large roundabout is capable of achieving the maximum attenuation of storm flows and is able to hold 100% of runoff from 100-year storm. As empty spaces are increasingly hard to come by in urban areas; therefore, using an open space in a roundabout for dry detention pond is a good example of an innovative drainage system.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130905724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study evaluated the site characteristics influencing the time and cost delivery of building projects, determined the range of percentage cost and time overrun and developed a neural network model for predicting the percentage cost and time overrun using the site characteristics of building projects. The study evaluated twelve site characteristics and two performance indicators obtained from records of construction costs, contract documents, and valuation reports of 126 purposively sampled building projects spread across several cities in Nigeria. Analyses were with descriptive and artificial neural network. It was concluded that with fairly favourable site characteristics, cost overrun range reached 77.95% with a mean variation of 44.36%, while time overrun range reached 51.23% with a mean variation of 26.77%. It was found that the accuracy performance levels of 91.93% and 91.43% for the cost and time overrun predictions respectively were very high for the optimum models. Building projects have eight significant site characteristics which can be used to reliably predict the percentage overrun, among which the ground water level, level of available infrastructure and labour proximity around the site are the most important predictors of cost and time overrun. The study recommended that project owners, consultants, contractors and other stakeholders should always use the eight identified site characteristics in predicting percentage cost and time overrun, with more priority on the first three characteristics. The study also recommended the neural network prediction approach due to its prediction accuracy.
{"title":"UTILIZING SITE CHARACTERISTICS IN NEURAL NETWORK MODELLING OF PERCENTAGE COST-TIME OVERRUN OF BUILDING PROJECTS","authors":"A. Ujene, A. Umoh","doi":"10.33736/JCEST.374.2017","DOIUrl":"https://doi.org/10.33736/JCEST.374.2017","url":null,"abstract":"This study evaluated the site characteristics influencing the time and cost delivery of building projects, determined the range of percentage cost and time overrun and developed a neural network model for predicting the percentage cost and time overrun using the site characteristics of building projects. The study evaluated twelve site characteristics and two performance indicators obtained from records of construction costs, contract documents, and valuation reports of 126 purposively sampled building projects spread across several cities in Nigeria. Analyses were with descriptive and artificial neural network. It was concluded that with fairly favourable site characteristics, cost overrun range reached 77.95% with a mean variation of 44.36%, while time overrun range reached 51.23% with a mean variation of 26.77%. It was found that the accuracy performance levels of 91.93% and 91.43% for the cost and time overrun predictions respectively were very high for the optimum models. Building projects have eight significant site characteristics which can be used to reliably predict the percentage overrun, among which the ground water level, level of available infrastructure and labour proximity around the site are the most important predictors of cost and time overrun. The study recommended that project owners, consultants, contractors and other stakeholders should always use the eight identified site characteristics in predicting percentage cost and time overrun, with more priority on the first three characteristics. The study also recommended the neural network prediction approach due to its prediction accuracy.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130595880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Compressed cement-soil block is used as low cost building material. In the south-western region of Bangladesh, there is availability of organic soil which is in the formation of overlying layer. Moreover, sandy materials do not occur and are not found easily in Bangladesh. The scarcity of sandy materials has led to the increase of the retail price and subsequently to higher production cost. So organic soil materials have been used as filler directly to produce cement-soil block. In this study, the compressive and flexural strengths of cement-soil block of density 1448kg/m³ to 1611kg/m³ with specified ratio of cement content were investigated using prism specimens. The observed elapsed periods were 1, 3, 7, 14, 28, 56 and 112 days with the variation of organic contents of 2%, 5%, 10%, 20% and 40%. Preferable results on the 28th day indicated that the compressive strength and the flexural strength of cement-soil block with 20% organic content increased by 125% and 102% respectively. Moreover, the influence of density on the strength properties of cement-soil block was found to be higher than the age of the specimen.
{"title":"EFFECT OF ORGANIC SOIL ON STRENGTH PROPERTIES OF COMPRESSED CEMENT-SOIL BLOCK","authors":"M. Shirin, M. Ali, Md. Rabiul Hasan, M. S. Islam","doi":"10.33736/JCEST.377.2017","DOIUrl":"https://doi.org/10.33736/JCEST.377.2017","url":null,"abstract":"Compressed cement-soil block is used as low cost building material. In the south-western region of Bangladesh, there is availability of organic soil which is in the formation of overlying layer. Moreover, sandy materials do not occur and are not found easily in Bangladesh. The scarcity of sandy materials has led to the increase of the retail price and subsequently to higher production cost. So organic soil materials have been used as filler directly to produce cement-soil block. In this study, the compressive and flexural strengths of cement-soil block of density 1448kg/m³ to 1611kg/m³ with specified ratio of cement content were investigated using prism specimens. The observed elapsed periods were 1, 3, 7, 14, 28, 56 and 112 days with the variation of organic contents of 2%, 5%, 10%, 20% and 40%. Preferable results on the 28th day indicated that the compressive strength and the flexural strength of cement-soil block with 20% organic content increased by 125% and 102% respectively. Moreover, the influence of density on the strength properties of cement-soil block was found to be higher than the age of the specimen.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115120489","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents an alternative water storage concept at lower sea-river interface vis-a-vis the conventional dam/reservoir storage scheme in the upper headwater region of a river basin. Two (2) estuary or coastal reservoir schemes are proposed to meet the future water demand of Johor Bahru and its vicinity. The low flow yields of a 98% reliability (or design 1:50-year return period) for both river schemes are also presented. A hydrological assessment is carried out to correlate the hydrometric variables, i.e. rainfall and streamflow. A long term 54-year streamflow record is adopted as input to the yield calculation. The reliable yields of 98% reliability criteria are in turn estimated based on a water balance or mass conservation. This new paradigmatic shift of reservoir storage location from headwater region to lower estuary/coastal interface can harness sufficient yield to meet the future demand of Johor Bahru and vicinity.
{"title":"COASTAL AND ESTUARY RESERVOIR: CASE STUDIES FOR JOHOR RIVER BASIN","authors":"H. Heng, W. Pan, F. Siaw, C. Hii","doi":"10.33736/jcest.376.2017","DOIUrl":"https://doi.org/10.33736/jcest.376.2017","url":null,"abstract":"This paper presents an alternative water storage concept at lower sea-river interface vis-a-vis the conventional dam/reservoir storage scheme in the upper headwater region of a river basin. Two (2) estuary or coastal reservoir schemes are proposed to meet the future water demand of Johor Bahru and its vicinity. The low flow yields of a 98% reliability (or design 1:50-year return period) for both river schemes are also presented. A hydrological assessment is carried out to correlate the hydrometric variables, i.e. rainfall and streamflow. A long term 54-year streamflow record is adopted as input to the yield calculation. The reliable yields of 98% reliability criteria are in turn estimated based on a water balance or mass conservation. This new paradigmatic shift of reservoir storage location from headwater region to lower estuary/coastal interface can harness sufficient yield to meet the future demand of Johor Bahru and vicinity.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131088655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An operation rule curve of a dam provides specific on the target elevation of thereservoir. This can vary throughout the year. This is an indication to the reservoir operator ofactivities to conduct for various situations involving reservoir and the hydrologic conditions.This rule curve shall apply to Murum dam solely for power generation purpose. Thedecisions on when and how much to release will impact the ability to pass a flood as well ashydropower capacity. The main objective of this research is to select the most suitablemethod and to develop the operation rule curves for Murum dam primarily for hydropowergeneration. A trial-and-error method has been selected for this study. Reservoir operationmodeling and simulation have been commenced using historical rainfall data, after runoffwas generated by rainfall runoff modellings. Three (3) simulations are conducted fordeveloping the operation rule curves. They are rule curve according to Sarawak EnergyBerhad’s requirement, ideal rule curve and mean rule curve. All three sets of rule curves aresuccessfully developed using turbine discharges of the dam as the parameters and to achievethe target firm energy generation of 635MW.
{"title":"STUDY ON RULE CURVE DEVELOPMENT FOR HYDRO ELECTRIC POWER (HEP) DAM OPERATION. CASE STUDY: MURUM HEP DAM","authors":"G. Titus, F. J. Putuhena","doi":"10.33736/JCEST.305.2016","DOIUrl":"https://doi.org/10.33736/JCEST.305.2016","url":null,"abstract":"An operation rule curve of a dam provides specific on the target elevation of thereservoir. This can vary throughout the year. This is an indication to the reservoir operator ofactivities to conduct for various situations involving reservoir and the hydrologic conditions.This rule curve shall apply to Murum dam solely for power generation purpose. Thedecisions on when and how much to release will impact the ability to pass a flood as well ashydropower capacity. The main objective of this research is to select the most suitablemethod and to develop the operation rule curves for Murum dam primarily for hydropowergeneration. A trial-and-error method has been selected for this study. Reservoir operationmodeling and simulation have been commenced using historical rainfall data, after runoffwas generated by rainfall runoff modellings. Three (3) simulations are conducted fordeveloping the operation rule curves. They are rule curve according to Sarawak EnergyBerhad’s requirement, ideal rule curve and mean rule curve. All three sets of rule curves aresuccessfully developed using turbine discharges of the dam as the parameters and to achievethe target firm energy generation of 635MW.","PeriodicalId":346729,"journal":{"name":"Journal of Civil Engineering, Science and Technology","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116596192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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