Based on the environmental status of the river basin in 1970 , the upper reaches , middle and lower reaches in the river basin are evaluated , which are approximatively represented by the gulang county , liangzhou borough , minqin county and jinchang city 以该流域70年代环境状况为基础，以流域内行政分区的古浪县、凉州区、金昌市和民勤县近似地代替流域的中上游、中游和下游，进行综合评价。
Based on analysis of the reasons that cause oasis disintegration such as annual decrease of influx , under groundwater level to annually descend and vegetation descending and their rules , the tendency in the future of the hydrology and oasis under the current condition primarily estimated 对此分析了民勤入境水量的逐年衰减、地下水位持续下降、荒漠草原超载放牧等引起绿洲衰变的主要成因及其变化规律，并初步估算了现状条件下水文及绿洲未来变化趋势。
In this passage , author has studied the quota of irrigation that can make water used economically for various plants , if the irrigation quota can be lowered from 6795 m3 / a to 4500 m3 / a during the processes of irrigation , there will be a saving water amount of 3 . 386million m3 / a , in shiyang river basin . there is no doubt that we can open the second source of river water that can provide the possibility of transporting 300 million m3 / a water amount to lower reaches of the river . in this paper , there are some analysis and prospects for the future situation of supply and demand of water resources in 2010 民勤水资源减少的主要原因是人为因素，如全流域人口增加、中上游耕地面积扩大，用水量增加，造成灌区重心上移；没有树立可持续发展观，在经济中搞短期行为；对石羊河流入民勤水量不断减少、地表水、地下水转化活跃、生态用水问题突出等方面进行了分析论证；对目前开发利用现状、供需状况进行了较为详细的计算和评价；通过对各种农作物节水灌溉定额的研究，若从现状灌溉定额6795m ~ 3 ha降低到4500m ~ 3 ha实施灌溉，石羊河流域将节水3 . 3867亿m ~ 3 ，这无疑于开辟了第二水源，提供了向下游调水3亿m ~ 3的可能性。
The field experiment study for cotton and corn was conducted in xiaobakou irrigation experiment station in minqin country , gansu province . the main results are as follows : ( 1 ) applying the theory of soil - water flow system in ground water , the mechanism of water - saving and product - enhancing for drip irrigation under mulch were analysised 本文以棉花和玉米为研究对象，在甘肃民勤小坝口灌溉试验站对此进行了系统的田间试验研究，得出以下主要结论： ( 1 )应用地下水土壤水流动系统理论，分析了膜下滴灌节水增产的机理。
Basing on the research into the influence of water resources ecological environment on population development , economic growth and society advancement in minqin county gansu province , this essay suggests the principle of basing population development on water resource and ecological migration pattern 摘要本文以对甘肃省民勤县的深入调查为基础，按照以水定人的思路，在认真分析目前该县的水生态环境对人口发展、经济增长和社会进步的产重影响的基础上，提出了具体的生态移民的规划思路、移民设计和运作模式等。
In this paper , the quality , quantity , and distribution conditions of water resources in minqin county have been assessed in terms of site investigation and collection of data . according to the formation background of water resources , the main reason of enlarged desert areas results from reduction of water resources 本文通过进行实际调查，广泛收集资料，对民勤县水资源数量、质量、及分布规律进行了客观评价；根据水资源形成背景，分析导致民勤荒漠化的根本原因是水资源减少，即石羊河流入民勤的水量不断减少。
Designning well tube and drill - hole diameter in order to increase thickness of both annular packing gravel and water - resisting clay , nylon net packing around well tube filters , designing filter layer on the boundary between packing gravel and water - resisting clay and ramming the gravel by working the piston into the well after gravel packing completion and the filling clay for salt - water resisting etc . we succeeded in constructing 3 drinking - water wells in minqin county , proved the affectivity and feasibility of using it and giving a certain technical demonstration of construction of drinking - water well in the same similar to this area 通过孔径与管径的调配设计，增大环状粒料层和止水粘土层的厚度；滤水管外包尼龙纱网；粒料与止水粘土接触界面上设计反滤层；填粒后先行拉活塞利用水力夯实粒料层，再投粘土球止掉上部咸水等措施，在民勤县三口人饮水井施工中取得显著效果，证明了该套成井工艺的有效性和可行性，有望为同类地区人饮水井施工提供技术示范作用。
For the present situation of seriously over - exploited groundwater resources and the rapid declining level of groundwater in the minqin oasis in the lower reach of shiyang river , as well as the induced effects of ecology and environment , the concept and calculation method of ecological water demand for restoration level of groundwater were provided , then ecological water demand for restoration level of groundwater from 2000 to 2019 is forecasted 摘要针对石羊河下游民勤绿洲地下水资源严重超采，地下水位持续快速下降的现状，以及所引起的生态环境效应，提出了恢复地下水位生态需水量的概念和计算方法，并且预测出2000 - 2019各年恢复地下水位生态需水量。
The order of the result is : gulang ( ii ~ iii ) < liangzhou ( iii ) < jinchang ( iii ~ iv ) < minqin ( v ) the conclusion shows that the environmental negative effect on water resources development is sharply increased from upper reaches to lower reaches , especially in minqin county , the effect is up to very strong ( v ) . it approximately matches case with practice , which reveals the feasibility of the thought of the models 而从各年度模糊评判结果可知，民勤县水土环境效应在1975年时综合评判级别为中等( iii )级别;到1980年时，发展到了较强( w )级别，此后的1980一1990年间评判级别都为较强级别; 1995年综合评判结果达到了很强( v )级别， 2000年在此基础上仍为很强。
