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。
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。
Where rain falls around the world is changing and that is already affecting crop yields and freshwater supplies . in turn , diminished water and food security puts extra pressure , for example , on fragile states in sub - saharan africa and exacerbates already high water stress in the middle east 降雨量在世界范围内的改变已经影响到粮食产量和淡水供应，水资源减少、食品缺乏进而给诸如撒哈拉沙漠以南一些国力脆弱的非洲国家造成了更大压力，也加剧了中东地区的供水紧张。
In taking forward epp , the government has seen how the policy objectives act as a vital management tool in good and bad times alike . when additional resources were available the objectives allowed the government to prioritise bids . when fewer new resources were available , value for money from the baseline was even more essential and the explicit policy objectives allowed the government to ensure that resources and efforts were directed to real priorities 在有额外资源可用时，施政方针帮助政府决定拨款申请的优先次序；在可用的新资源减少时，基线以外的开支更须符合经济效益，而明确的施政方针正好帮助政府确保人力物力都放在真正须优先处理的项目上。
Burning dme in the diesel engine can solve the problem that petroleum resources is reducing based on the long - term viewpoint , meanwhile , it can meliorate the emission pollution based on the short - term viewpoint , which develop a realistically feasible approach to solve tow big difficult problems , namely crisis of energy and environmental pollution 在柴油机上燃用二甲醚，从长远来看，可以解决石油资源减少的问题，从近期考虑，则能够改善排气污染，它为解决能源危机和环境污染两大难题开辟了一条现实可行的道路。
