伊洛河流域降雨与植被类型对产流产沙的交互影响研究OA

In order to investigate the interactive effects of vegetation type and rainfall characteristics on slope runoff and sediment yield processes,this study was conducted based on field-measured data.Methods such as K-means clustering were employed to analyze the rainfall,runoff and sedi-ment yield characteristics of bare land,agricultural land,and forested area in the Hugou small watershed of the Yiluo River from 2019 to 2024.Fur-thermore,the benefits of runoff and sediment reduction were analyzed.The results show that:the runoff depth and soil erosion in bare land plots are greater than that in agricultural land and the smallest is in forest land during each rainfall event.Under short-duration and high-intensity heavy rain-fall,sediment yield from bare land is five times greater than under medium-to-long duration and low-intensity rainstorms,making it the rainfall type that produces the highest sediment yield.Long-duration and low-intensity heavy rainfall is more conducive to runoff generation,while forestland ex-hibits the lowest soil loss.Among all rainfall types,forested areas consistently demonstrate greater runoff and sediment reduction benefits than agri-cultural lands.Runoff depth in bare land and agricultural areas shows a significant positive correlation with rainfall,while forested areas exhibits a highly significant positive correlation between runoff depth and rainfall.Soil erosion amount across vegetation types shows a significant positive cor-relation with rainfall intensity.Runoff depth on bare land and cropland exhibits an exponential relationship with soil erosion amount,while runoff depth on forested land demonstrates a polynomial relationship with soil erosion amount.