南阳市水资源量及降水量年际变化趋势分析

Analysis of Interannual Variation Trend of Water Resources and Precipitation in Nanyang City

利用南阳市2001-2020年水资源总量、地表水资源量、地下水资源量以及年降水量为基础数据,采用变化趋势法、相关分析法和双累积曲线法等计算分析方法,探讨分析了南阳市水资源量的年际变化特征和地表水资源量与降水量年际变化相关程度。研究结果表明。南阳市降水量和地表水资源量变化呈正相关,但地表水资源量的年际变幅大于降水量的年际变幅。2010年南阳市降水—径流关系发生改变,通过分析降水和人类活动对年径流量的影响程度,发现降水对年径流量变化程度影响较小、人类活动对年径流量变化程度影响较大。研究结果为优化南阳市水资源配置提供重要依据。

Based on the data of total water resources,surface water resources,groundwater resources and precipitation in Nanyang City from 2001 to 2020,the interannual variation characteristics of water resources in Nanyang City and the correlation degree of interannual variationbetween surface water resources and precipitation were explored and analyzed using calculation and analysis methods such as trend change method,correlation analysis method,and double cumulative curve method.The research results indicate that here is a positive correlation between precipitation and changes in surface water resources in Nanyang City,but the interannual variation of surface water resources is greater than the that of precipitation.In 2010,the relationship between precipitation and runoff in Nanyang City changed.By analyzing the impact of precipitation and human activities on the annual runoff,it was found that precipitation had a relatively small impact on the change in annual runoff,while human activities had a significant impact on the change in annual runoff.The research results provide important basis for optimizing the allocation of water resources in Nanyang City.