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基于五道沟实验站1991~1999年实测降水、地表径流及地下水位埋深资料,运用水文学原理及数理统计方法,选取不同降雨量和降雨类型,分析了不同量级降雨量、前期土壤干湿状态、次降雨过程砂姜黑土地表径流量及径流系数随地下水位埋深的变化规律。结果表明,对于砂姜黑土,在50mm以上日降雨过程中,存在土壤表层蓄满、深部超渗的分层产流机制;地表径流量及径流系数随地下水位埋深增加呈指数递减趋势,且随降雨量的增加地表径流系数呈上升趋势;而前期土壤干旱时间长、土壤含水率较低、地表径流系数随地下水位埋深增加而减少,且降雨集中分布比降雨分散分布的地表径流系数高。
Based on the measured data of precipitation, surface runoff and groundwater table depth from 1991 to 1999 in Wudaogou Experimental Station, different rainfall and rainfall types were selected by using hydrological principles and mathematical statistics methods. The effects of different degrees of rainfall, Changes of Surface Runoff and Runoff Coefficient along with Groundwater Table Buried in Shajiang Black Soil in Wet and Subjected Rainfall. The results showed that there was a mechanism of stratified runoff in which the soil surface was full and deep in the process of daily rainfall over 50 mm. The surface runoff and runoff coefficient decreased exponentially with the increase of the groundwater table buried depth With the increase of rainfall, the surface runoff coefficient is on the rise. However, the earlier the period of soil drought is longer and the water content of soil is lower, the surface runoff coefficient decreases with the increase of groundwater table depth, and the rainfall runoff distribution is higher than that of rainfall. .