Hydrology-Vegetation Of Characteristics Of Wuliangsuhailake

Semiarid region has the sensitivity of response characteristics of anthropogenic disturbance and climate change. Distribution of water resources within semiarid region is relative lack, even more scarce with lake resources. Compared with the subhumid regions lakes, both water environment carrying capacity, and self-purification function of lakes are more vulnerable. In addition, with human activities, the physical and chemical conditions of lakes and hydrological factors are significantly changed. The influence of aquatic vegetation of lakes is also increasingly obvious. Lakes environmental pollution has been the fact that does not dispute. Therefore, the status quo conditions, the study of hydrology-vegetation response-relationship of semiarid region are greatly significant and urgent.This paper, on the basis of collection the hydrological and meteorological data, the satellite image data, which is surrounding areas of Wuliangsuhai Lake, combined the site investigation with the indoor experiment. Using remote sensing technology, geographic information systems, multi-information statistics and screening methods, Through analysis water cycle of Wuliangsuhai Lake obtained farmland irrigation water back into the lake accounts for the total amount 71%-86% of Wuliangsuhai, which is the main water into the lake, affecting the water level changes of Wuliangsuhai Lake;the spatial pattern of vegetation which is based on RS & GIS technology can be drawn:aquatic debris accumulate constantly in the lake, constantly raise the bottom of the lake; a large number of eutrophic salt into lake and deposition, the reeds and aquatic plants thrive, accelerated lake bio-filled role. Eutrophication of Wuliangsuhai Lake continues to increase, the lake will lead to the gradual destruction of the environment, increasing loss of water function; Research Hydrology-Vegetation Relation of Wuliangsuhai Lake obtained to identify aquatic vegetation within the lake and its surrounding wetland vegetation growth factor is a master of farmland irrigation water back into the lake caused the water level and changes in eutrophic salt concentrations, control farmland irrigation water into the lake can effectively improve the eutrophication and restore ecological function of Wuliangsuhai Lake.