Wang Sheng-Feng, Xu Xin-Miao, Lei Long-Wei
North China University of Water Resources and Electric Power, Zhengzhou, 450046, China.
Sci Rep. 2024 Oct 27;14(1):25606. doi: 10.1038/s41598-024-75780-9.
With the advancement of urbanization, there has been a significant reduction in cultivated land, accompanied by soil erosion. Concurrently, the regularity of rainfall in recent years has been erratic, adversely impacting the grain economy and agricultural development in certain regions. Henan Province, spanning the basins of the Yangtze River, the Yellow River, the Huaihe River, and the Haihe River, possesses complex hydrological conditions and serves as a pivotal agricultural zone in China. Therefore, this paper utilizes daily rainfall data collected over 54 years (1969-2022) from 112 rain measuring stations in Henan Province to calculate the rainfall erosivity using the Zhang model and the erosivity model from the first national water survey. Meanwhile, spatial analysis was performed using the Kriging interpolation method in the ArcGIS Geostatistical Wizard, resulting in detailed spatial distribution maps of rainfall and rainfall erosivity. The study also employed Wavelet and Mann-Kendall tests to analyze the abrupt changes, trends and periodicity of rainfall and rainfall erosivity within the target region. The findings indicate that the average rainfall (1969-2022) in Henan province was 718.26 mm, while the average rainfall erosivity (R) was 3213.46 MJ mm/(hm h). R values are positively correlated with rainfall intensity and volume, displaying an annual upward trend. Spatially, R values increase gradually from northwest to southeast, closely aligning with topographical variations. Additionally, the analysis revealed a predominant periodic cycle of 54 years in the precipitation patterns. These results offer valuable insights for environmental and agricultural management in other regions of central China.
随着城市化进程的推进，耕地面积大幅减少，同时伴有土壤侵蚀问题。与此同时，近年来降雨规律变得不稳定，对某些地区的粮食经济和农业发展产生了不利影响。河南省横跨长江、黄河、淮河和海河流域，水文条件复杂，是中国重要的农业区。因此，本文利用河南省112个雨量测量站54年（1969 - 2022年）收集的日降雨数据，采用张模型和第一次全国水利普查侵蚀力模型计算降雨侵蚀力。同时，在ArcGIS地理统计向导中使用克里金插值法进行空间分析，生成降雨和降雨侵蚀力的详细空间分布图。该研究还采用小波分析和曼 - 肯德尔检验来分析目标区域内降雨和降雨侵蚀力的突变、趋势和周期性。研究结果表明，河南省1969 - 2022年的平均降雨量为718.26毫米，而平均降雨侵蚀力（R）为3213.46兆焦毫米/（公顷小时）。R值与降雨强度和降雨量呈正相关，呈逐年上升趋势。在空间上，R值从西北向东南逐渐增加，与地形变化密切相关。此外，分析还揭示了降水模式中54年的主要周期。这些结果为中国中部其他地区的环境和农业管理提供了有价值的见解。
