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Scaling Approaches to Evaluating Spatial Variability of Saturated Hydraulic Conductivity and Cumulative Infiltration of an Acrisol 饱和水导率及累积入渗空间变异性的标度方法研究
Pub Date : 2014-05-01 DOI: 10.12983/IJSRK-2014-P0224-0232
H. O. Tuffour, M. Bonsu, A. A. Khalid, T. Adjei-Gyapong
Spatial variability of soil properties has been frequently assessed using classical statistics and geostatistics. However, the scaling theory approach has also proven to be an effective method to describe the variation of soil hydraulic properties. The objective of this study was to evaluate the structure of spatial variability in soil hydraulic and hydrologic processes using scaling techniques in the Plantations Section of the Department of Crops and Soil Sciences, KNUST, Kumasi. Field infiltration studies were conducted using the single ring infiltrometer. Saturated hydraulic conductivity (Ks) was determined in the laboratory by the falling head permeameter. The similar media theory approach was employed in the scaling of Ks, while cumulative infiltration amount (I) was scaled using the linear variability theory. Scaling factors and parameters of the reference curves were computed directly from the parameters of individual soil hydraulic and hydrologic parameters and reference curves were obtained to represent Ks and I in the field. Scaling factors ranged from 0.23 to 2.66 with a mean of 1.00 for Ks, I and cumulative time. The composite Ks and I for the study area calculated by using different, but related, scaling factors was successful, though the distribution and range of the parameters were highly variable.
土壤性质的空间变异性通常用经典统计学和地质统计学来评估。然而,尺度理论方法也被证明是描述土壤水力特性变化的有效方法。本研究的目的是在库马西KNUST作物和土壤科学系种植科利用尺度技术评估土壤水力和水文过程的空间变异结构。采用单环渗透计进行了现场入渗研究。饱和水导率(Ks)在实验室用降头渗透仪测定。k的标度采用相似介质理论方法,累积入渗量(I)的标度采用线性变率理论。参考曲线的标度因子和参数直接由单个土壤的水力和水文参数参数计算,得到代表田间k和I的参考曲线。k、I和累积时间的比例因子范围为0.23 ~ 2.66,平均值为1.00。采用不同但相关的标度因子计算研究区的综合k和I是成功的,尽管参数的分布和范围变化很大。
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引用次数: 3
Impact of Organic Amendments and Inorganic Fertilizers on Production Potential, Nitrogen Use Efficiency and Nitrogen Balance in Tomato (Lycopersicon esculentum Mill.) 有机肥和无机肥对番茄生产潜力、氮素利用效率和氮素平衡的影响
Pub Date : 2014-05-01 DOI: 10.12983/IJSRK-2014-P0233-0240
R. Chatterjee, S. Bandyopadhyay, J. C. Jana
Tomato plant demands adequate plant nutrients especially nitrogen for optimum growth and yield. Amount of dry matter produced per unit of nitrogen applied or absorbed can be judged by estimating the nitrogen use efficiency of different nutrient sources used for tomato cultivation. The present experiment was aimed to examine the effect of 15 different combinations of organic and inorganic nutrient sources on growth and yield attributes, nitrogen use efficiency and soil nitrogen balance. The result revealed that tomato growth and yield attributes as well as different parameters of nitrogen use efficiency (PFP, AE, PUE and AR) were remarkably influenced by the application of different sources of nutrients. Substitution of 25% of recommended fertilizer dose was possible when higher amount of organic manures and biofertilizer were combined together. Vermicompost emerged as better organic nutrient source over farmyard manure. Inoculation with biofertilizer exerted more positive result over uninoculated treatments and benefits of biofertilizer application were prominent in presence of vermicompost. The nutrient schedule comprising of 75% recommended fertilizer dose of inorganic fertilizers and vermicompost (4 t/ha) inoculated with biofertilizer was found best for growth, yield attributes as well as the NUE parameters and soil nitrogen balance. This should be practiced to achieve desired yield, nutrient use efficiency and sustaining the fertility and productivity of soil.
番茄植株需要充足的植物营养,特别是氮,以达到最佳生长和产量。通过估算番茄栽培中不同营养源的氮素利用效率,可以判断施氮或吸收单位氮素所产生的干物质量。本试验旨在研究15种不同有机和无机营养源组合对水稻生长和产量属性、氮素利用效率和土壤氮素平衡的影响。结果表明,不同营养源的施用对番茄生长和产量属性以及氮素利用效率(PFP、AE、PUE和AR)的不同参数均有显著影响。较高的有机肥与生物肥配合施用,可替代推荐用量的25%。蚯蚓堆肥成为比农家肥更好的有机营养源。接种有机肥比未接种有机肥效果更好,在蚯蚓堆肥存在的情况下,施用有机肥的效益更突出。以75%推荐用量的无机肥料配以4 t/ hm2蚯蚓堆肥接种生物肥料的施肥方案对生长、产量属性、氮肥利用效率参数和土壤氮平衡最有利。应该这样做,以达到预期的产量,养分利用效率和维持土壤的肥力和生产力。
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引用次数: 12
Performance of Soil Embankment Model under Static and Cyclic Loading 土路堤模型在静循环荷载作用下的性能研究
Pub Date : 2014-05-01 DOI: 10.12983/IJSRK-2014-P0241-0248
S. Sarsam, Mahmood Diab Alahmad, Hussein Qasim Al-Nadaf
The sandy soil with high gypsum content, (usually referred to as gypseous soil), possesses a type of cohesive forces when mixed with optimum amount of water and then compacted, but losses its strength when flooded with water again. The gypseous soil obtained from Al-Fallujah was subjected to laboratory investigation. The physical and chemical properties and then optimum liquid asphalt (emulsion) requirement were determined. A laboratory soil embankment-model of 50x50x30 cm was implemented to study the impact of absorption by capillary rise on the stability of embankment. Load repetitions test was carried out on four gypseous soil models, two of them were pure soil at dry and absorbed conditions, and the other two were stabilized with emulsion at dry and absorbed condition. Another set of four gypseous soil models of the same condition were tested under static load. The impact of changing the hydraulic conductivity of soil due to asphalt stabilization was investigated and the vertical deformation was determined using LVDT. For the pure soil in dry condition the vertical deformation was 7.45 mm at 157 load repetitions, while for pure soil model under absorbed condition, the vertical deformation was 12.5 mm at 29 load cycles. The stabilized soil at dry condition exhibits vertical deformation of 9.75 mm at 911 load cycles, and shows 10.47 mm deformation at 897 load cycles under absorption. When tested under static load, the ultimate sustained pressure was 0.8 MPa with vertical settlement 0.03 mm for pure soil at dry condition, and reduced to 0.3 MPa with vertical settlement 12 mm at absorbed condition.
高石膏含量的砂质土(通常称为石膏土),在与适量的水混合后压实时具有一种粘结力,但在再次被水淹没时失去其强度。对从费卢杰获得的石膏土进行了实验室调查。确定了沥青的理化性能,确定了最佳沥青液(乳液)用量。采用50x50x30 cm的室内土路堤模型,研究毛细上升吸附对路堤稳定性的影响。对4个石膏土模型进行了荷载重复试验,其中2个模型为纯土,2个模型为乳状液稳定模型。另一组4个相同条件的石膏土模型进行静载试验。研究了沥青稳定对土体导电性的影响,并利用LVDT法测定了竖向变形量。在157次荷载循环下,纯土模型的垂直变形量为7.45 mm,在29次荷载循环下,纯土模型的垂直变形量为12.5 mm。干燥条件下稳定土在911次荷载循环下竖向变形量为9.75 mm,在897次荷载循环下竖向变形量为10.47 mm。静载试验中,纯土在干燥状态下的极限持续压力为0.8 MPa,垂直沉降0.03 mm;在吸收状态下,极限持续压力降至0.3 MPa,垂直沉降12 mm。
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引用次数: 3
Analysis of the Impact of Organizational Culture on Manager's Decision Making Patterns in Iranian Governmental Departments (Case Study: Government Departments of Sarpolzohab City) 组织文化对伊朗政府部门管理者决策模式的影响分析(以Sarpolzohab市政府部门为例)
Pub Date : 2014-04-23 DOI: 10.12983/IJSRK-2014-P0173-0181
P. Akbari, A. Darabi
Culture in the broadest sense refers to complex and advanced human products such as art, philosophy, science and technology and in the social sciences is the shed, to a system of shared meanings, which accepted in collectively reveal way by a certain group at a specific time based on this system carried out meanings, Interaction and behavior of the group. So, the purpose of this study was to analyze the effect of Organizational Culture on Manager's Decision Making Patterns in Iranian Governmental Departments Case study: Government Departments of Sarpolzohab City. The statistical population of the study consisted of 60 subjects from which between them. 52 subjects were selected by Simple random sampling and by using Cochran's formula as samples for the second half of 2013. So this research is descriptive - survey of correlation type. For data collection were used the decision making Questionnaire Robbins (1990) and Organizational culture questionnaire Hofstede (1991). To examine the questionnaire validity was used content validity (verification of questionnaire by a group of university professors) and reliability of the questionnaires was investigated also with calculating by Cronbach alpha coefficient 0.750 for the first questionnaire, and 0.780 for second questionnaire. The results of testing hypotheses by SPSS software in two levels of descriptive and inferential test showed that Organizational Culture has a significant effect on Manager's Decision Making Patterns in Iranian Governmental Departments.
文化在最广义上是指复杂而先进的人类产品,如艺术、哲学、科学和技术,在社会科学中是棚屋,是一种共享意义的系统,它以集体的方式被某一群体在特定的时间所接受,并在此系统的基础上展开意义、互动和行为。因此,本研究的目的是分析组织文化对伊朗政府部门管理者决策模式的影响,以萨波尔佐哈卜市政府部门为例。该研究的统计人口由60名受试者组成,他们之间。采用简单随机抽样和Cochran公式选取2013年下半年的52名受试者作为样本。因此,本研究是描述性的相关性调查。数据收集采用了决策问卷Robbins(1990)和组织文化问卷Hofstede(1991)。问卷的效度采用内容效度(大学教授组对问卷进行验证),信度采用Cronbach alpha系数计算,第一份问卷为0.750,第二份问卷为0.780。采用SPSS软件进行描述性和推理性两级检验的假设检验结果表明,组织文化对伊朗政府部门管理者的决策模式有显著影响。
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引用次数: 0
Chinese Sulphur Dioxide Emissions and Local Environment Pollution 中国二氧化硫排放与局部环境污染
Pub Date : 2014-04-06 DOI: 10.12983/IJSRK-2014-P0265-0276
H. Mohajan
During the last 30 years Chinese economy has increased rapidly. The pollution of air in many Chinese cities exceeds both national and international standards due to rapid urbanization, industrialization and increased energy consumption. At present China becomes the highest sulphur dioxide emitter in the world due to its reliance on coal for energy generation. The Government of China has taken different steps to reduce sulphur dioxide and succeeded from the 11th Five-Year Plan. Breathing in sulphur dioxide can irritate the nose, throat and the lungs, causing phlegm, coughing, shortness of breath, development of bronchitis and other respiratory diseases, as well as aggravation of existing cardiovascular disease. Long-term contact to sulphur dioxide at lower concentrations can cause temporary loss of smell, headache, nausea and dizziness. In this paper an attempt has been taken to discuss sulphur dioxide emissions of China and stresses on desulphurization processes.
在过去的30年里,中国经济增长迅速。由于快速的城市化、工业化和能源消耗的增加,中国许多城市的空气污染超过了国家和国际标准。目前,由于依赖煤炭发电,中国成为世界上最大的二氧化硫排放国。中国政府采取了不同的措施来减少二氧化硫,并在“十一五”计划中取得了成功。吸入二氧化硫会刺激鼻子、喉咙和肺部,导致痰多、咳嗽、呼吸短促、患上支气管炎和其他呼吸道疾病,以及加重现有的心血管疾病。长期接触较低浓度的二氧化硫会导致短暂的嗅觉丧失、头痛、恶心和头晕。本文试图讨论中国的二氧化硫排放,并着重讨论脱硫过程。
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引用次数: 14
A Review on Apraclonidine in Glaucoma Treatment 阿普拉尼定治疗青光眼的研究进展
Pub Date : 2014-04-01 DOI: 10.12983/IJSRK-2014-P0208-0214
M. Shahid, S. Khair-ul-Bariyah
The word glaucoma means "opacity of the crystalline lens". It is a disease known to cause sudden vision loss. The intraocular fluid fails to drain so the drainage mechanism of the eyes gets blocked. Fluid starts building up and so the pressure inside the eyes starts increasing. The optic nerves get effected and the vision is lost. The medication is given in the form of eye drops sometimes followed by surgery. Alpha-adrenergic agonists are an important class of the medications given for glaucoma treatment including brimonidine and apraclonidine. Apraclonidine has been found to be effective (0.5-1% concentration) in lowering intraocular pressure. Its efficacy has been checked against acetazolamide, brimonidine, timolol and dorzolamide and the drug has shown promising results. It has shown greater hyotensive effect as compared to other medications and its drops have been reported to exhibit corneal biomedical response. The present review aims to cover the studies done in the last ten years on the effectiveness of apraclonidine but still a lot of work needs to be done in checking its potential with beta-blockers, other alpha-adrenergic agonists and other classes of glaucoma medication.
青光眼这个词的意思是“晶状体混浊”。这是一种已知会导致突然视力丧失的疾病。眼内液体无法排出,因此眼睛的排水机制被阻塞。液体开始积聚,因此眼睛内的压力开始增加。视神经受到影响,视力丧失。这种药物以滴眼液的形式给予,有时随后进行手术。肾上腺素能激动剂是青光眼治疗中重要的一类药物,包括溴硝定和阿普拉定。阿普拉尼定(0.5-1%浓度)可有效降低眼压。它与乙酰唑胺、溴莫尼定、替马洛尔和多唑胺的疗效进行了对比,显示出良好的效果。与其他药物相比,它显示出更大的降压效果,据报道,它的滴剂表现出角膜生物医学反应。本综述旨在涵盖近十年来对阿普拉尼定有效性的研究,但仍有许多工作需要做,以检查其与-受体阻滞剂,其他-肾上腺素能激动剂和其他类型的青光眼药物的潜力。
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引用次数: 0
Ethnocomputing: Using ICT to Preserve the Culture of the People of North-Rift Region of Kenya 民族计算:利用资讯及通讯技术保存肯亚北裂谷地区人民的文化
Pub Date : 2014-04-01 DOI: 10.12983/IJSRK-2014-P0199-0207
Metto S. Kimutai, Awuor F. Mzee, Okuthe P. Kogeda, Kimeli V. Kimutai, S. Africa
The impact and interaction of ICT and African culture is a critical issue as African nations position themselves to reap the benefits of ICT for development. African nations have different attitudes towards cultural regeneration and dissemination as the continent struggles to address the ambiguous role and position of culture as it forge ahead with her development agenda and find her position in the global information revolution. It is essential for African countries to ensure that adopting ICT for development (ICT4D) does not destroy their beautiful cultural heritage. Culture is passed from one generation to another through inheritance as young generation is brought up in it, thus, growing up to appreciate and passes it on to their children. However, at such a time when the world is drastically embracing information age, the value of culture may easily be lost. African conservatives and elders are worried that their children are losing their "good" traditions and culture. In the evolution of the information society, particular attention must be given to the special situation of indigenous peoples, as well as to the preservation of their heritage and their cultural legacy. In this regard, this paper attempts to address the following issues: how do we adopt ICT4D in Africa yet keep our culture and heritage? And how we use ICT to preserve Africa"s culture? This paper considers a case of North Rift region of Kenya due to its rich and well preserved culture and heritage.
信息通信技术与非洲文化的影响和相互作用是一个关键问题,因为非洲国家希望从信息通信技术促进发展中获益。非洲国家对文化再生和传播有着不同的态度,因为非洲大陆在推进其发展议程并在全球信息革命中找到自己的位置时,正在努力解决文化的模糊角色和地位。非洲国家必须确保采用信息通信技术促进发展(ICT4D)不会破坏其美丽的文化遗产。文化通过继承从一代传到另一代,因为年轻一代在其中长大,因此长大后会欣赏并传递给他们的孩子。然而,在这样一个世界急剧进入信息时代的时代,文化的价值很容易失去。非洲的保守派和长者担心他们的孩子正在失去他们的“好”传统和文化。在信息社会的发展过程中,必须特别注意土著人民的特殊情况,以及保护他们的遗产和文化遗产。在这方面,本文试图解决以下问题:我们如何在非洲采用ICT4D的同时保留我们的文化和遗产?我们如何利用信息通信技术来保护非洲的文化?本文考虑了肯尼亚北部裂谷地区的一个案例,因为它的丰富和保存完好的文化遗产。
{"title":"Ethnocomputing: Using ICT to Preserve the Culture of the People of North-Rift Region of Kenya","authors":"Metto S. Kimutai, Awuor F. Mzee, Okuthe P. Kogeda, Kimeli V. Kimutai, S. Africa","doi":"10.12983/IJSRK-2014-P0199-0207","DOIUrl":"https://doi.org/10.12983/IJSRK-2014-P0199-0207","url":null,"abstract":"The impact and interaction of ICT and African culture is a critical issue as African nations position themselves to reap the benefits of ICT for development. African nations have different attitudes towards cultural regeneration and dissemination as the continent struggles to address the ambiguous role and position of culture as it forge ahead with her development agenda and find her position in the global information revolution. It is essential for African countries to ensure that adopting ICT for development (ICT4D) does not destroy their beautiful cultural heritage. Culture is passed from one generation to another through inheritance as young generation is brought up in it, thus, growing up to appreciate and passes it on to their children. However, at such a time when the world is drastically embracing information age, the value of culture may easily be lost. African conservatives and elders are worried that their children are losing their \"good\" traditions and culture. In the evolution of the information society, particular attention must be given to the special situation of indigenous peoples, as well as to the preservation of their heritage and their cultural legacy. In this regard, this paper attempts to address the following issues: how do we adopt ICT4D in Africa yet keep our culture and heritage? And how we use ICT to preserve Africa\"s culture? This paper considers a case of North Rift region of Kenya due to its rich and well preserved culture and heritage.","PeriodicalId":14310,"journal":{"name":"International Journal of Scientific Research in Knowledge","volume":"58 1","pages":"199-207"},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90913106","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}
引用次数: 2
The Effect of different Concentrations of Silver Nanoparticles on Enzyme Activity and Liver Tissue of Adult Male Wistar Rats in-vivo Condition 不同浓度银纳米颗粒对成年雄性Wistar大鼠体内酶活性及肝脏组织的影响
Pub Date : 2014-04-01 DOI: 10.12983/IJSRK-2014-P0182-0188
S. Gavanji, S. Sayedipour, Mohsen Doostmohammadi, Behrouz Larki
Nanotechnology as a branch of science which is related to nano materials helps in overcoming the limitations of size and can change the outlook of the world regarding science. Silver nano particles, due to their strong antimicrobial properties, are widely applicable in different industries. So, research on nano silver properties and its harmful effects on human and environment is critical. The aim of the present study is testing the harmful properties of Silver nano particles, in the size 18 to 32 nm, on enzymes and tissues of liver in Wistar rats. At first 50 adult male Wistar rats were picked and concentrations 5, 10, 20 and 40 ppm of Silver nano particle were tested on AST, ALT, ALP and GGT enzymes. Results showed that only 40 ppm of silver nano particle possesses a meaningful effect on ALT enzyme, and none of the other concentrations has meaningful effect on AST, ALP and GGT. Moreover, histopathology test from liver tissue revealed no damage in liver cells. As nano silver shows harmful effects on a broad range of cells, predetermined dosages of nano silver in limited amounts are suggested.
纳米技术作为一门与纳米材料有关的科学分支,有助于克服尺寸的限制,并可以改变世界对科学的看法。银纳米颗粒由于其强大的抗菌性能,在不同的行业中有着广泛的应用。因此,研究纳米银的性质及其对人类和环境的危害至关重要。本研究的目的是测试尺寸为18至32纳米的银纳米颗粒对Wistar大鼠的酶和肝脏组织的有害特性。选取成年雄性Wistar大鼠50只,分别检测5、10、20和40 ppm浓度银纳米颗粒对AST、ALT、ALP和GGT酶的影响。结果表明,只有40 ppm纳米银颗粒对ALT酶有显著影响,其他浓度对AST、ALP和GGT均无显著影响。肝组织病理检查未见肝细胞损伤。由于纳米银对广泛的细胞显示有害影响,因此建议在有限的量内预先确定纳米银的剂量。
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引用次数: 5
Using Self-Organizing Maps for Alluvial Fan Classification 利用自组织地图进行冲积扇分类
Pub Date : 2014-04-01 DOI: 10.12983/IJSRK-2014-P0189-0198
A. Seif, M. Mokarram, D. Sathyamoorthy
Morphometry research used geography information system (GIS) to explore alluvial fan morphology for determination of fans location and fast and accurate analysis. The aim of this study is to classify alluvial fans formed by high- gradient braided streams and torrents that discharge into the Oshtorankook altitudes in the Lorestan province, Iran. The morphology of the fans and their watershed is quantitatively described through estimated morphometric parameters. For relationships between geomorphological features of the fans and their drainage basins, self-organizing maps (SOM) were used. In SOM, according to both qualitative data and morphometric variables, the clustering tendency of alluvial fans was investigated using 15 alluvial fans parameters. The results of the analysis showed that several morphologically different fan types were recognized based on their geomorphological characteristics in the study area. A strong positive relationship was found between the drainage basin area and size of the fan with a simple power function. In addition, the relationship between fan slope and drainage area was found to be negative and moderately strong with a simple power function.
形态计量学研究利用地理信息系统(GIS)对冲积扇形态进行探索,确定扇的位置并进行快速准确的分析。本研究的目的是对流入伊朗洛勒斯坦省Oshtorankook海拔地区的高梯度辫状溪流和急流形成的冲积扇进行分类。扇形及其流域的形态通过估计的形态计量参数进行定量描述。利用自组织图(SOM)研究扇体地貌特征与流域之间的关系。在SOM中,根据定性数据和形态计量变量,利用15个冲积扇参数对冲积扇的聚类趋势进行了研究。分析结果表明,根据研究区扇的地貌特征,可以识别出几种形态不同的扇类型。通过简单的幂函数,发现流域面积与风机尺寸之间存在很强的正相关关系。此外,风机坡度与排水面积之间的关系为负,关系较强,为简单的幂函数。
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引用次数: 1
Examining Issues of Groundwater Resources Exploitation in Malayer plain, Iran 伊朗马利尔平原地下水资源开发问题研究
Pub Date : 2014-03-01 DOI: 10.12983/IJSRK-2014-P0124-0133
F. Zand, A. Sahraei
In this study, depth of phreatic zone of Malayer plain, which is the third largest plain of the province, has been investigated. The drainage basin of Malayer water, covering an area of 2965 km 2 , is located 80 km south of Hamadan. For this study, performance records of 43 existing wells were monitored over a period of 17 years (1994-2011). Data obtained were subjected to statistical analysis. The aquifer level hydrograph and equipotential maps were drawn in AutoCAD environment. The results of this study are indicative of the estimation of a 20.20 meter total dip and a 415.96 million-cubic-meter reservoir volume shortage in the 17 year period, caused by uncontrolled exploitations. In the water year of 1998-1999 the dip amount has reached 3.72 meters which is equivalent to more than one sixth of the total dip. The largest dip between years 1999-2010 with 39 meters was in Aznav village and the smallest dip in the same period of time with 1.08 meters was in Farvaz village. From the elements of dropping the phreatic surface, precipitation decrease and waiving the maximum exploitation limits through under-exploitation wells could be mentioned.
本研究对全省第三大平原——马来平原的潜水带深度进行了研究。马来河流域位于哈马丹以南80公里处,面积2965平方公里。在这项研究中,研究人员对43口现有井进行了为期17年(1994-2011)的监测。得到的数据进行统计分析。在AutoCAD环境下绘制含水层水线图和等势图。研究结果表明,在17年的时间里,由于不受控制的开采,水库总倾角为20.20米,水库容量短缺4.1596亿立方米。在1998-1999水年,下降量达3.72米,相当于总下降量的六分之一以上。1999-2010年间,Aznav村下降幅度最大,为39米;Farvaz村同期下降幅度最小,为1.08米。从下降表层、降水减少、欠开发井放弃最大开采极限等方面可以提出来。
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引用次数: 0
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International Journal of Scientific Research in Knowledge
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