摘要
为了解塔里木沙漠公路防护林生态工程对地下水位的影响,在该工程第69#灌溉水源井处设置观测场,通过多个观测井的非稳定流抽水试验,观测井中地下水位的变化情况,确定了研究区域的含水层渗透系数K=13.317m/d、抽水影响半径R=332.04 m。分析了地下水位降落"漏斗"和水位下降、上升随时间和空间的变化规律:在2个抽水应力期内,水位急速下降和上升过程均可在抽水试验开始后的11 min内完成,随着时间的累积,变化趋势逐渐缓慢;抽水结束后,水位可恢复到初始水平。因此,研究认为塔里木沙漠公路防护林生态工程灌溉期抽水不会引起天然地下水位的持续下降,这将为沙漠公路沿线地下水资源的可持续利用和防护林生态工程整体的稳定性及长久运行提供一定的理论依据。
Setting observation site at 69# irrigation fountain well for grasping effect status of groundwater level from ecological engineering along the shelterbelts of the Tarim desert highway.Tested unsteady lift irrigation with multi-well to observe change status of groundwater level,made infiltration coefficient（K） of hydrous-stratum is 13.317 m/d,effect radius（R） of lift irrigation is 332.04 m in the studied region.The paper analyzes change rule of groundwater level with time and space,express decline and rise of groundwater level is achieved in 11 minutes after starting lift irrigation,change trend gradually slow down with time accumulation,between two time lift irrigation,groundwater level comes back initialized level after lift irrigation end.So,research result shows groundwater level persistent decline is not truth for lift irrigation of ecological engineering along the shelterbelts of the Tarim desert highway,which provides datum basic for sustainable using of groundwater resource and steady function of shelterbelts ecological engineering.
出处
《干旱环境监测》
2010年第2期94-99,共6页
Arid Environmental Monitoring
关键词
塔里木沙漠公路
防护林生态工程
地下水位
Tarim desert highway
shelterbelts ecological engineering
groundwater level
