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内蒙古河套灌区地下水位埋深分布规律及其影响因素分析 被引量:14
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作者 苏阅文 冯绍元 +1 位作者 王娟 徐英 《中国农村水利水电》 北大核心 2017年第7期33-37,44,共6页
根据河套灌区220个观测井1980-2013年地下水位观测资料,运用Arc GIS10.2绘制地下水位等值线图,分析得出:河套灌区地下水位自西向东呈现递减趋势,在灌区东部乌拉特灌域局部地区形成了地下水漏斗,地下水位埋深年内变化具有明显的季节性,... 根据河套灌区220个观测井1980-2013年地下水位观测资料,运用Arc GIS10.2绘制地下水位等值线图,分析得出:河套灌区地下水位自西向东呈现递减趋势,在灌区东部乌拉特灌域局部地区形成了地下水漏斗,地下水位埋深年内变化具有明显的季节性,年际变化具有明显的周期性;利用灰色关联理论分析地下水位埋深变化的主要影响因素,得出其主要驱动因子及排序为:蒸发量>引黄水量>降雨量。研究结果可为该区地下水开发利用和水环境保护提供科学依据。 展开更多
关键词 河套灌区 地下水位 ARC gis10.2 灰色关联分析
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Watershed Characteristics and Landuse Analysis of Govindsagar Catchment, Lalitpur (UP) India Using Remote Sensing and GIS Techniques
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作者 Akram Javed Samreen Fatima 《International Journal of Geosciences》 2017年第11期1374-1383,共10页
Watershed characteristics and land use/land cover study is necessary, for improved decision-making and for the resource management strategies. The methodology necessitates the provision of the base map from SOI toposh... Watershed characteristics and land use/land cover study is necessary, for improved decision-making and for the resource management strategies. The methodology necessitates the provision of the base map from SOI toposheet, delineation of drainage, preparation of slope and flow direction map using ASTER data and for the land use/land cover change detection, visual interpretation has been carried out using IRSP6-LISS-III data of 2005 and 2015. The land use/land cover analysis discloses several categories of land cover as well as land use present in Govindsagar variation from 2005 to 2015. The study area is mainly cramped to cultivated land and uncultivated land which show changes since last decade, there is an increase in cultivated land of about 4.86% of the geographical area where as uncultivated land (fallow land) shows a decline of 1.61% of the total geographical area, morphometric analysis reveals that area has impermeable subsurface materials and mountainous relief with dendritic drainage pattern with low surface runoff. 展开更多
关键词 Arc gis10.2 WATERSHED MORPHOMETRY Visual INTERPRETATION Landuse/Landcover
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