P. Hu, Q. Sun, F. Lei, Qingfeng Meng, Lei Hu, Zhongyi Yu
In this paper, the principle of a measuring device on thermal response test is introduced and a three-dimensional numerical model is developed. What¡¯s more, the effect of testing time, starting time point, ending time point and volumetric specific heat on the calculation results of the thermal response test by two variable parameter fitting method and three-dimensional numerical model are also discussed. It is validated that the volumetric specific heat is not sensitive to the thermal conductivity of the soil and has a little effect on borehole thermal resistance. The initial soil temperature, the end data point and start data point all affect the thermal conductivity and borehole thermal resistance to some extent. An enough length of testing time should be remained.
{"title":"The Influencing Factor on Test of Parameter of the Rock-Soil Thermal Properties","authors":"P. Hu, Q. Sun, F. Lei, Qingfeng Meng, Lei Hu, Zhongyi Yu","doi":"10.1109/CDCIEM.2011.553","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.553","url":null,"abstract":"In this paper, the principle of a measuring device on thermal response test is introduced and a three-dimensional numerical model is developed. What¡¯s more, the effect of testing time, starting time point, ending time point and volumetric specific heat on the calculation results of the thermal response test by two variable parameter fitting method and three-dimensional numerical model are also discussed. It is validated that the volumetric specific heat is not sensitive to the thermal conductivity of the soil and has a little effect on borehole thermal resistance. The initial soil temperature, the end data point and start data point all affect the thermal conductivity and borehole thermal resistance to some extent. An enough length of testing time should be remained.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89905886","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}
Y. Yonggang, Zhu Shenhong, Lian Qiuyi, Yan Benju, Chen Yu
Yi Nan Gold tailings are well known as difficulty to make fired bricks due to their high content of calcium and low silicon¡ªaluminum content. Based on the analysis of their basic properties, research has been taken on using them to make fired bricks by press forming. The results indicated that the optimum technology system was: forming pressure 15MPa, forming water content 8%~9%£¬water content before sintering 1%, sintering temperature 1050¡æ, holding time 60minutes. By applying this treating methodology£¬the compressive strength of the brick with 75% fine tailings and 25% medium tailings can reach MU10.
{"title":"Research on Making Fired Bricks with Gold Tailings","authors":"Y. Yonggang, Zhu Shenhong, Lian Qiuyi, Yan Benju, Chen Yu","doi":"10.1109/CDCIEM.2011.411","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.411","url":null,"abstract":"Yi Nan Gold tailings are well known as difficulty to make fired bricks due to their high content of calcium and low silicon¡ªaluminum content. Based on the analysis of their basic properties, research has been taken on using them to make fired bricks by press forming. The results indicated that the optimum technology system was: forming pressure 15MPa, forming water content 8%~9%£¬water content before sintering 1%, sintering temperature 1050¡æ, holding time 60minutes. By applying this treating methodology£¬the compressive strength of the brick with 75% fine tailings and 25% medium tailings can reach MU10.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84585662","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}
Organic matter (OM) is important for ammonium sorption in lake sediments, but as a matter of fact, there is no general consensus about the effects of OM on ammonium adsorption behavior. In this study, the sediment samples of different OM contents and the different components of organic matter were gained from Wuli Lake sediment through pretreatment, then the ammonium adsorption kinetics and thermodynamics processes were investigated without taking the mineralization of OM into account in simulating laboratory condition, especially analyzing the ammonium adsorption mechanism and adsorption contribution of the different component of OM using scan electronic microscope (SEM)techniques. The results show that the ammonium adsorption on sediments was effected by the OM content and the humified degree of OM simultaneously, The different components of OM had different surface characteristics, and the order of ammonium adsorption capacity was HA>HKB>KB>BC;Controlled by the humified degree of OM, the accessibly young OM (HA) rather than the total OM was a factor in the adsorption of ammonium.
{"title":"The Effects of Organic Matter on Ammonium Adsorption in Wuli Lake Sediments","authors":"Juan Wang, Yuejin Zhang","doi":"10.1109/CDCIEM.2011.291","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.291","url":null,"abstract":"Organic matter (OM) is important for ammonium sorption in lake sediments, but as a matter of fact, there is no general consensus about the effects of OM on ammonium adsorption behavior. In this study, the sediment samples of different OM contents and the different components of organic matter were gained from Wuli Lake sediment through pretreatment, then the ammonium adsorption kinetics and thermodynamics processes were investigated without taking the mineralization of OM into account in simulating laboratory condition, especially analyzing the ammonium adsorption mechanism and adsorption contribution of the different component of OM using scan electronic microscope (SEM)techniques. The results show that the ammonium adsorption on sediments was effected by the OM content and the humified degree of OM simultaneously, The different components of OM had different surface characteristics, and the order of ammonium adsorption capacity was HA>HKB>KB>BC;Controlled by the humified degree of OM, the accessibly young OM (HA) rather than the total OM was a factor in the adsorption of ammonium.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82989573","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}
The process and action mechanism of the copper wastewater adsorption accomplished by ferric salt and cerous salt modified water granulated slag were studied in this paper. Results showed that under the conditions of room temperature of 20¡æ, dosage of 6g/L, pH 7, reaction time of 60min to treat 100mL20mg/L copper wastewater, the removal rate reached 93.64%. The adsorption of modified water granulated slag to copper fits the Temkin adsorption isotherm best and the result of linear transformation of adsorption isotherm is qe=20.71lnCe-4.2413, R2= 0.9531.
{"title":"Treatment of Wastewater Containing Copper by Modified Water Granulated Slag","authors":"Lirong Chen, Feihu Jia, Xin Meng","doi":"10.1109/CDCIEM.2011.518","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.518","url":null,"abstract":"The process and action mechanism of the copper wastewater adsorption accomplished by ferric salt and cerous salt modified water granulated slag were studied in this paper. Results showed that under the conditions of room temperature of 20¡æ, dosage of 6g/L, pH 7, reaction time of 60min to treat 100mL20mg/L copper wastewater, the removal rate reached 93.64%. The adsorption of modified water granulated slag to copper fits the Temkin adsorption isotherm best and the result of linear transformation of adsorption isotherm is qe=20.71lnCe-4.2413, R2= 0.9531.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83117020","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}
Three dominant bacteria of A-1, B-1 and C-1 for phenol degradation were screened by domestication. Then study on the treatment efficiency of phenol by the three dominant bacteria was carried out under different concentration of phenol wastewater. The results showed that phenol removal efficiency decreased as the phenol concentration increasing. The phenol removal efficiency rates achieved 46.74%, 51.43% and 23.08% by A-1, B-1 and C-1 in24h when phenol concentration was 50 mg•L-1, and 70.22%,75.19% and 20.43% when concentration was 100 mg•L-1. The best degradation efficiency achieved by the bacterium B-1. Lastly, effect of reaction time, pH and temperature on phenol degradation with B-1 was studied. The result showed when reaction time was 48h, pH was 7, temperature was 30¡æ, phenol and COD removal efficiency achieved about 50% and 30%, respectively.
{"title":"Study on Screening of Dominant Bacteria for Phenol Degradation","authors":"Lan Shanhong, Wu Xiuwen, Xu Ping-ru","doi":"10.1109/CDCIEM.2011.483","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.483","url":null,"abstract":"Three dominant bacteria of A-1, B-1 and C-1 for phenol degradation were screened by domestication. Then study on the treatment efficiency of phenol by the three dominant bacteria was carried out under different concentration of phenol wastewater. The results showed that phenol removal efficiency decreased as the phenol concentration increasing. The phenol removal efficiency rates achieved 46.74%, 51.43% and 23.08% by A-1, B-1 and C-1 in24h when phenol concentration was 50 mg•L-1, and 70.22%,75.19% and 20.43% when concentration was 100 mg•L-1. The best degradation efficiency achieved by the bacterium B-1. Lastly, effect of reaction time, pH and temperature on phenol degradation with B-1 was studied. The result showed when reaction time was 48h, pH was 7, temperature was 30¡æ, phenol and COD removal efficiency achieved about 50% and 30%, respectively.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90326984","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}
According to the general constitutive equation of granular flow, impact of size fractal distribution on porosity and internal friction angle was studied experimentally with large-scale indoor relative densitometer and direct shear apparatus. The results show that, under the condition of the same physical density, elastic recovery coefficient and the geometric mean median granular size, porosity increases with fractal dimension increasing, meanwhile, the internal friction angle, particle concentration, shear stress and normal stress coefficients declines. Further more, in term of analysis on impact of size fractal distribution on flow behavior of granular flow system, it is found that, as for the system with smaller fractal dimension, shear stress is large and the fluid is poor and robustness is strong, On the contrary, as for the system with larger fractal dimension, shear stress is small and the fluid is good and sensitivity is strong. The discussion focuses on the mechanism of impact of fractal characteristics on collapse flow behavior of granular material, which offers a new idea for the study of granular flow system.
{"title":"Impact of Size Fractal Distribution on Flow Behavior of Granular Flow System","authors":"Gao Zhao-ning, Li Ying-ming","doi":"10.1109/CDCIEM.2011.404","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.404","url":null,"abstract":"According to the general constitutive equation of granular flow, impact of size fractal distribution on porosity and internal friction angle was studied experimentally with large-scale indoor relative densitometer and direct shear apparatus. The results show that, under the condition of the same physical density, elastic recovery coefficient and the geometric mean median granular size, porosity increases with fractal dimension increasing, meanwhile, the internal friction angle, particle concentration, shear stress and normal stress coefficients declines. Further more, in term of analysis on impact of size fractal distribution on flow behavior of granular flow system, it is found that, as for the system with smaller fractal dimension, shear stress is large and the fluid is poor and robustness is strong, On the contrary, as for the system with larger fractal dimension, shear stress is small and the fluid is good and sensitivity is strong. The discussion focuses on the mechanism of impact of fractal characteristics on collapse flow behavior of granular material, which offers a new idea for the study of granular flow system.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90680543","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}
Cheng ShaoChun, Huang Biao-cai, Zhu Rong, Yang Zhufang, Luo Diwei
The present paper discusses the technical characteristics of the converter duplex melting process(MURC), develop one special converter duplex melting process with low hot metal ratio to meet the actual producing condition of Fujian Sangang steel group. Research show, how to promote the melting of lime during dephosphorizing period is the key step for MURC process. Adjusting the charging amount of lime according to the w([Si]) content in hot metal is helpful to control the melting of lime and the slag basicity. Under the condition of low hot metal ratio, in dephosphorizing period, must raise the melting temperature referring to the conventional process, lower the target slag basicity and w(T.Fe)suitably. According to results of the special MURC process industrial experiments, this process can meet the requirements on the producing of high-performance steel. Average tapping w([C]) is 0.183%, w([P]) is 0.0183%. The average dephosphorization rate is more than 90%. At the same time, referring to the conventional process, the special MURC process save the consumption of steel material about 2.3kg/tand save the consumption of lime 11.2kg/t averagely.
{"title":"Technicial Research of Converter Duplex Melting Process with Low Hot Metal Ratio","authors":"Cheng ShaoChun, Huang Biao-cai, Zhu Rong, Yang Zhufang, Luo Diwei","doi":"10.1109/CDCIEM.2011.127","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.127","url":null,"abstract":"The present paper discusses the technical characteristics of the converter duplex melting process(MURC), develop one special converter duplex melting process with low hot metal ratio to meet the actual producing condition of Fujian Sangang steel group. Research show, how to promote the melting of lime during dephosphorizing period is the key step for MURC process. Adjusting the charging amount of lime according to the w([Si]) content in hot metal is helpful to control the melting of lime and the slag basicity. Under the condition of low hot metal ratio, in dephosphorizing period, must raise the melting temperature referring to the conventional process, lower the target slag basicity and w(T.Fe)suitably. According to results of the special MURC process industrial experiments, this process can meet the requirements on the producing of high-performance steel. Average tapping w([C]) is 0.183%, w([P]) is 0.0183%. The average dephosphorization rate is more than 90%. At the same time, referring to the conventional process, the special MURC process save the consumption of steel material about 2.3kg/tand save the consumption of lime 11.2kg/t averagely.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86466382","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}
Bosten Lake, which locates in arid and desert zone, is the largest lake in Xinjiang, and is the largest inland freshwater lake in China. It has giant value in environment, ecology and economy. The water level of Bosten Lake has taken place tremendously in the recent 50 years, the water level descended from 1048m above sea level in 1958 to that of1045m in 1987, and ascended from 1045m to 1048.9m during the period of 1988¡ª2002, it is in the highest level now. According to the records in recent 50 years, this paper analyzed the effect of human activities, restored the water level of natural environment quantitatively. The research results show that the change of human¡¯s effect undergo the process from weak to strong to weak, in which, the effect of human activities is the strongest from 1970s to 1980s, the effect has been weakened since 1990s.
{"title":"The Impact of Human Activities on the Water-Level Changes of Bosten Lake","authors":"Gao Huazhong","doi":"10.1109/CDCIEM.2011.70","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.70","url":null,"abstract":"Bosten Lake, which locates in arid and desert zone, is the largest lake in Xinjiang, and is the largest inland freshwater lake in China. It has giant value in environment, ecology and economy. The water level of Bosten Lake has taken place tremendously in the recent 50 years, the water level descended from 1048m above sea level in 1958 to that of1045m in 1987, and ascended from 1045m to 1048.9m during the period of 1988¡ª2002, it is in the highest level now. According to the records in recent 50 years, this paper analyzed the effect of human activities, restored the water level of natural environment quantitatively. The research results show that the change of human¡¯s effect undergo the process from weak to strong to weak, in which, the effect of human activities is the strongest from 1970s to 1980s, the effect has been weakened since 1990s.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81890197","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}
The development of mining leads to many bad effects. The surface vegetation is badly destroyed due to subsidence. The paper gives an introduction to geological environment problems related with mining, such as subsidence, waste rock hills, water loss, soil erosion and quarry ruin. At the same time, the ecological problems have also been resulted into threaten normal living and working surroundings. To solve the above-mentioned problems many investigations have been done, however previous studies have failed to cope with the real geological situation, thus further studies are still necessary. Taking Xishan mining area as an example, comprehensive measures are discussed to permanently deal with things concerning village relation, geological park construction and geological environment restoration. By setting up technology models, the real control ways are provided. In order to echo to Taiyuan Municipal Government's plan, new ideas are put forward by constructing a suburban ecological tourist area featured with ecological conservation, mine relics exhibition and mountain sightseeing, By discussing the comprehensive technology models, the old development model of "solutionafter pollution", will be abandoned and two sorts of treatment are proposed, which are characterized by friendly environment and safe coal production. The result of the study will be a good reference for treating the similar problems in other mining area like Xishan mining area.
{"title":"Comprehensive Geological Environment Technology in Mining Area","authors":"Jiao Xuefeng, Kang Tianhe, Wang Dong","doi":"10.1109/CDCIEM.2011.524","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.524","url":null,"abstract":"The development of mining leads to many bad effects. The surface vegetation is badly destroyed due to subsidence. The paper gives an introduction to geological environment problems related with mining, such as subsidence, waste rock hills, water loss, soil erosion and quarry ruin. At the same time, the ecological problems have also been resulted into threaten normal living and working surroundings. To solve the above-mentioned problems many investigations have been done, however previous studies have failed to cope with the real geological situation, thus further studies are still necessary. Taking Xishan mining area as an example, comprehensive measures are discussed to permanently deal with things concerning village relation, geological park construction and geological environment restoration. By setting up technology models, the real control ways are provided. In order to echo to Taiyuan Municipal Government's plan, new ideas are put forward by constructing a suburban ecological tourist area featured with ecological conservation, mine relics exhibition and mountain sightseeing, By discussing the comprehensive technology models, the old development model of \"solutionafter pollution\", will be abandoned and two sorts of treatment are proposed, which are characterized by friendly environment and safe coal production. The result of the study will be a good reference for treating the similar problems in other mining area like Xishan mining area.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80373488","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}
S. Jia, J. Hao, Wang Keli, Xu Juanjuan, Li Zhaoguo, Zhu Qingliang, Luo Xinping
It is of great significance to understanding deeply mechanism of precipitation and estimating accurately amount of precipitation. The purpose of this work is to explore the atmosphere effects on the precipitation over the Hei he river basin. Based on NCEP/NCAR re-analysis dataset with the resolution of 1¡ã¡Á1¡ã and 2.5¡ã¡Á2.5¡ã over the period 2000~2006and monthly precipitation from 15 stations for the same period, we investigated the vertical circulation and vapor conditions for the local-scale and further explore large-scale atmospheric circulation patterns for the rainy years and less rainy years. The comparative analysis results show that for both kinds of years, the water vapor all are net inflow averaged from June to September. However, there are notable differences in western and south boundary. In the western boundary, the inflow of vapor for the rainy years is more than that for the less rainy years. In the south boundary, there is a net inflow of vapor in the rainy years. Whereas there is a net outflow in the less rainy years. Besides, one more important point is that local ascending motion which is predominantly meridional over the Heihe river basin. Its range, position, and intensity have remarkable differences in the rainy years and less rainy years. The maximum vertical velocity is 1.2 cm/s for the former, and that for the latter is only 0.8 cm/s with the difference of 0.4cm/s. This phenomenon is discovered for the first time in this region. Furthermore, more/less precipitation corresponds well with the higher/lower Qinghai-Tibet plateau temperature, stronger/weaker 100hPa high-pressure of the Qinghai-Tibet plateau, and stronger/weaker westerly jet. The interaction of these systems aforementioned can make more precipitation mainly due to more water vapor inflow and stronger converging-ascending motion for the rainy years. The opposite is the case for the less rainy years.
{"title":"The Analysis of Atmospheric Circulation and Water Vapor Conditions of Precipitation over the Heihe River Basin","authors":"S. Jia, J. Hao, Wang Keli, Xu Juanjuan, Li Zhaoguo, Zhu Qingliang, Luo Xinping","doi":"10.1109/CDCIEM.2011.421","DOIUrl":"https://doi.org/10.1109/CDCIEM.2011.421","url":null,"abstract":"It is of great significance to understanding deeply mechanism of precipitation and estimating accurately amount of precipitation. The purpose of this work is to explore the atmosphere effects on the precipitation over the Hei he river basin. Based on NCEP/NCAR re-analysis dataset with the resolution of 1¡ã¡Á1¡ã and 2.5¡ã¡Á2.5¡ã over the period 2000~2006and monthly precipitation from 15 stations for the same period, we investigated the vertical circulation and vapor conditions for the local-scale and further explore large-scale atmospheric circulation patterns for the rainy years and less rainy years. The comparative analysis results show that for both kinds of years, the water vapor all are net inflow averaged from June to September. However, there are notable differences in western and south boundary. In the western boundary, the inflow of vapor for the rainy years is more than that for the less rainy years. In the south boundary, there is a net inflow of vapor in the rainy years. Whereas there is a net outflow in the less rainy years. Besides, one more important point is that local ascending motion which is predominantly meridional over the Heihe river basin. Its range, position, and intensity have remarkable differences in the rainy years and less rainy years. The maximum vertical velocity is 1.2 cm/s for the former, and that for the latter is only 0.8 cm/s with the difference of 0.4cm/s. This phenomenon is discovered for the first time in this region. Furthermore, more/less precipitation corresponds well with the higher/lower Qinghai-Tibet plateau temperature, stronger/weaker 100hPa high-pressure of the Qinghai-Tibet plateau, and stronger/weaker westerly jet. The interaction of these systems aforementioned can make more precipitation mainly due to more water vapor inflow and stronger converging-ascending motion for the rainy years. The opposite is the case for the less rainy years.","PeriodicalId":6328,"journal":{"name":"2011 International Conference on Computer Distributed Control and Intelligent Environmental Monitoring","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2011-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90210688","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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