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以淮河上游息县水文站以上流域为例,基于研究区域3期(20世纪80年代、90年代、2000年以后)土地利用数据及地形、气象、水文、土壤、农业管理等数据,应用SWAT模型模拟研究区域产汇流过程,分析土地利用变化对流域产水特性的影响。结果表明:在降水量、坡度和土壤质地相同的情况下,径流模数大小为旱地>水田>林地;在坡度和土壤质地相同的情况下,土地利用方式对降水量变化的产水敏感性为旱地>水田>林地(径流系数变化率),可见土地利用模式的变化可影响流域的产水特性,耕地向林地的转变将使流域产水减少。
Taking the watershed above the Hydrographic Station at Youxiu County in the Huaihe River basin as an example, based on the data of land use in Phase 3 of the study area (1980s, 1990s and 2000s) and topographic, meteorological, hydrological, soil and agricultural management data, the SWAT model The process of producing and sinking in the area was simulated and the effect of land use change on water production characteristics of the basin was analyzed. The results showed that under the same conditions of precipitation, slope and soil texture, the runoff modulus was dry land> paddy field> woodland. Under the same slope and soil texture, the water sensitivity of land use pattern to the change of precipitation was Dry land> paddy field> woodland (change rate of runoff coefficient) shows that the change of land use pattern can affect the water production characteristics of the basin, and the change of arable land to forest land will reduce the water production in the basin.