论文部分内容阅读
地质时期及历史时期以来塔里木盆地南缘气候变化 ,尤其是温度变化引起水文条件及河流水系变迁是导致地下水变化并由此造成绿洲演化的主导因素。百年尺度的气温波动不足以引起水资源状况明显的变化 ,人类活动是近几十年导致区域地下水及生态环境变化的主要因素 ,通过天然河道人工渠系化 ,平原水库建设以及枢纽工程上移 ,加速和促进了地表水资源的时空再分配 ,从而引起了地下水空间补给变化。山前砾石戈壁倾斜平原的补给量不断减少 ,而人工绿洲区地下水补给量则随地表引水量的提高不断增加。同时以天然河道渗漏补给为主转向以渠系、田间入渗为主。
Since the geological period and the historical period, the climate change in the southern margin of Tarim Basin, especially the change of hydrological conditions caused by temperature change and the change of river water system are the main factors leading to the change of groundwater and thus the evolution of oasis. Hundreds of years of temperature fluctuations are not enough to cause significant changes in water resources. Human activities are the major factors that have led to changes in groundwater and ecological environment in recent decades. Through artificial channeling of natural rivers, construction of plains reservoirs and uplift of hubs, Accelerated and promoted the redistribution of surface water resources in time and space, which caused the change of groundwater recharge. The amount of recharge in the slope plains of the Gobi desert in the front of the mountain is decreasing. However, the recharge of groundwater in the artificial oasis area increases with the increase of the surface water diversion. At the same time, natural river seepage and supply mainly dominated by canal system and field infiltration.