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以大理河流域1960-2002年长系列降雨径流泥沙资料为基础,以1969年为分界年,视1969年以前为天然状态1,969年以后为治理状态,将该流域按照本区的地貌类型、下垫面及水文站网布设情况等划分为青阳岔水文站以上区域、李家河水文站以上区域和绥德水文站以上3个区域。对各区域分别建立无治理措施年份的汛期降雨量和汛期径流量、汛期降雨量和汛期泥沙量、汛期径流量和汛期泥沙量经验关系式,用经验关系式的计算值和相应实测值进行比较,来分析实施水土保持措施对大理河流域径流泥沙变化的影响。
Based on the long series of rainfall runoff and sediment data from 1960 to 2002 in the Dali River Basin, taking 1969 as the demarcation year, taking the natural state before 1969 as the natural state and treating it after 1996 as the treatment state, according to the landform type in this area The surface of the pad and the layout of the hydrological station network are divided into three areas above the Qingyangcha hydrological station, above the Lijiahe hydrological station and above the Suide hydrological station. For each region, the empirical formula of rainfall amount in flood season, runoff in flood season, rainfall in flood season, sediment amount in flood season, runoff amount in flood season and sediment amount in flood season were respectively established. Based on the empirical relationship and the corresponding measured values To analyze the impact of soil and water conservation measures on the runoff and sediment change in Dali River Basin.