研究结果和分析结论对了解黄河流域水资源演变具有十分重要的意义。
Furthermore, downriver precipitation gets more centralized than others'. The conclusions were important to research the evolvement of water resources the Yellow River Basin.
伴随着水资源利用分布格局的改变，河西走廊生态环境体系不断演变并趋于恶化。
The eco-environmental system tends to change and becomes deteriorated with the changes of water resources in utilization and distribution patterns.
同时，对于城市的防洪规划、洪水预报分析、河道演变规律及水资源综合利用等有着十分重大的意义。
At the same time, it has great use in a lot of fields, such as flood control of city, flood forecast analysis and water resources continuable use.
这对掌握华北地区水资源量的演变规律是一个有益的探索。
Thus this paper is an instructive search for mastering the evolvement law of precipitation in north China.
第一部分为石羊河流域水资源管理体系的历史演变。
The first part involves historical changes of water resources management system of the Shiyang River Basin.
降雨是地区水资源的主要来源，研究其长期的演变特性，对于水文水资源系统的预报、模拟具有十分重要的意义。
Rainfall is the main source of water resources in any region, studying the evolvement characteristic of the precipitation is of great importance for forecasting and simulating hydrology system.
因此，提出了充分认识流域水资源系统演变规律性，约束人类活动的影响，均衡保护利用流域水资源的有关建议。
Therefore, the article proposed some advices about respecting evolvement laws of groundwater system, restricting the affect of human behaviors, and maintaining a balanced use of water resources.
因此，提出了充分认识流域水资源系统演变规律性，约束人类活动的影响，均衡保护利用流域水资源的有关建议。
Therefore, the article proposed some advices about respecting evolvement laws of groundwater system, restricting the affect of human behaviors, and maintaining a balanced use of water resources.
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