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Owing to those unfavorable factors such as poor natural conditions, high altitude and vast territorial spread in Tibet, it is hard to locate water-rich areas accurately just with traditional hydrogeological survey methods, but remote sensing can do it. Using processed remote sensing Landsat TM/ETM imagery, this paper extracts geomorphology and geology information related to hydrogeology, discusses...
Focusing on BPNN model application and GIS spatial analysis, Hangzhou construction land geology environment suitability evaluation is studied in this article. BPNN model set up, evaluation indices system set up, samples selection, data process, etc., are studied deeply based on BPNN and GIS based quantitative and spatial analysis. For Hangzhou case, factors including topography features, engineering...
Water environment problems received extensive attention in recent years, take Jinan karst spring region for example, groundwater evolution characteristics were analyzed by observing changes of spring level, spring runoff, water quality and safety yield, authors thought the main reason of drying-up was inadequate understanding of the safety yield index. According to the characteristics of Jinan spring...
Miyun-Huairou-Shunyi area, located on the upper-middle alluvial fan of Chaobai River, is the largest groundwater source region of Beijing, China. The study area is approximately equal to 479 km2 and covers three counties. The area includes one ground-water sub-basin, named Chaobai River, which is filled with unconsolidated alluvial deposits that comprise the aquifer system. Groundwater constituted...
Eco-water (layer) refers to the water body closely related to the ground vegetation layer. It is conserved in leaves, roots, vegetation humus layers and root soil layers, which is capable of precipitation interception and rivers and/or groundwater supplementation. As a challenging issue in the hydrological cycle field, the eco-water and its resource quantity are difficult to be quantified by ordinary...
A field investigation of a TCE plume in a surficial sand aquifer shows that groundwater–surface water interactions strongly influence apparent plume attenuation. At the site, a former industrial facility in Connecticut, depth-discrete monitoring along three cross-sections (transects) perpendicular to groundwater flow shows a persistent VOC plume extending 700 m from the DNAPL source zone to a mid-size...
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