民勤绿洲农业发展对石羊河流下游水文过程及水质的影响

民勤盆地位于河西内陆干旱区域,近几十年绿洲农业的发展改变了天然水资源循环过程,使绿洲内发生了显著的水文过程变迁。分析了绿洲农业的发展对石羊河流下游的水文过程变迁及对水质的影响,结果表明:随着水资源开发利用,绿洲灌溉农业的发展造就了集约、高效化人工绿洲农业生态系统,同时也明显改变了地表水与地下水之间的转化条件、转化数量及水质,其负面效应已严重恶化了生态环境,直接威胁着民勤绿洲农业的持续稳定发展。

Effects of Minqin Oasis Agriculture Development on Hydrological Process and Water Quality of the Lower Reaches of Shiyang River

Minqin basin is located in Hexi inland arid area, in recent years the development of oasis agriculture has changed cycle process of the natural water which makes hydrological process of the oasis changes significantly. Effects of the development of oasis agriculture on hydro- logic process changes and water quality of the lower reaches of Shiyang River were analyzed. The results showed that the high efficient and in- tensive ecosystem of oasis agriculture is formed with the exploitation and utilization of water resources, as well as that the transformation condi- tion and transformation quantity between surface water and groundwater and water quality are immensely changed, and its negative effect not only led to serious eco-environmental problems, but also directly threaten to sustainable stabilization and development of Minqin Oasis agricul-ture.