宁夏全区及5市水循环健康状况分析

针对水环境及水资源基础条件变化下的水循环健康问题，以宁夏全区及其所辖5个地级市为研究对象，收集2010-2018年的相关基础数据资料，结合当地区域水资源实际状况，筛选出15个评价指标，利用主成分分析法对宁夏及5市水循环健康状况进行评价分析。结果表明：宁夏全区及5市的水循环健康状况均呈现整体上升的趋势，但由于各地区在经济发展及水环境治理政策之间的差异，因此在影响因素方面存在明显的地区差异性。银川市水循环健康状况主要受农业用水量和污水处理的影响，石嘴山市的主要影响因素是当地水资源量及污水处理能力，吴忠市主要取决于当地的生态投资及排水管道建设，固原市主要受当地水资源总量限制，中卫市的主要影响因素是农业用水量和绿化率。

Analysis of water cycle health status in Ningxia Hui Autonomous Region and its five subordinate cities

Aiming at the impact of changes in water environment and basic water resources conditions on the water cycle health, the whole region and five individual cities of Ningxia were taken as the research objects, and relevant basic data from 2010 to 2018 were collected. Based on the actual situation of local water resources, 15 evaluation indices were selected to evaluate the health status of the water cycle in the whole region and five cities, using principal component analysis. The results show that the health of the water cycle in the whole region and five individual cities of Ningxia showed an overall upward trend. However, due to the differences in economic development and water environment governance policies in various cities, there were obvious regional differences in influencing factors. The water cycle health of Yinchuan City was mainly affected by agricultural water consumption and sewage treatment; the main influencing factors in Shizuishan City were the amount of local water resources and sewage treatment capacity; Wuzhong City was bound by local ecological investment and drainage pipeline construction; Guyuan City was mainly limited by the total amount of local water resources; and the main influencing factors in Zhongwei City were agricultural water consumption and greening rate.