不同管理措施对密云水库流域水量水质变化的影响
发布时间：2019-03-28 15:31
【摘要】：在密云水库上游控制流域建立SWAT(Soil and Water Assessment Tool)水文模型,根据实测水量-水质数据对模型的参数进行优化。识别流域土壤侵蚀和污染物关键区域,并对不同管理措施对流域水量-水质的影响进行定量研究。研究结果表明:密云水库流域土壤侵蚀强度较大的集中在流域中下游临近河道的区域;潮河流域非点源污染状况较为严重,潮河和白河总氮流失超高风险区分别占总面积的62.62%和43.09%,白河流域总磷均为低流失风险区,潮河流域总磷高流失风险区占17.81%;等高耕作和梯田种植对于产沙量和污染物都有较好的去除效果,其中等高耕作对于产沙量和总氮、总磷负荷的削减率,潮河分别为25.16%、10.79%和32.89%,白河为47.60%、34.92%和53.49%;通过对比退耕还林和退耕还草措施得知,退耕还林的效果更优。研究结果可为密云水库流域水土保持和水环境治理提供决策依据。
[Abstract]:The SWAT (Soil and Water Assessment Tool) hydrological model was established in the upper reaches of Miyun Reservoir, and the parameters of the model were optimized according to the measured water quantity-water quality data. The key areas of soil erosion and pollutants in the watershed were identified, and the effects of different management measures on water quality and water quality of the watershed were quantitatively studied. The results show that the soil erosion intensity in Miyun reservoir basin is concentrated in the area near the river channel in the middle and lower reaches of the basin. The non-point source pollution in Chaohe River basin is serious, the total nitrogen loss superhigh risk areas of Chaohe River and Bai River account for 62.62% and 43.09% of the total area, respectively, and the total phosphorus in the Baihe River Basin is low risk area. The high risk area of total phosphorus loss in Chaohe River basin accounted for 17.81%. Contour tillage and terrace planting have better removal effects on sediment yield and pollutants, in which the reduction rates of sediment yield, total nitrogen and total phosphorus load are 25.16%, 10.79% and 32.89% in tidal river, respectively, and the reduction rates of sediment yield and total nitrogen and total phosphorus load are 25.16%, 10.79% and 32.89% in tidal river, respectively. White River was 47.60%, 34.92% and 53.49%; Through comparing the measures of returning farmland to forest and returning farmland to grassland, the effect of returning farmland to forest is better. The results can provide decision-making basis for soil and water conservation and water environment control in Miyun reservoir basin.
【作者单位】： 北京师范大学水科学研究院水沙科学教育部重点实验室;
【分类号】：TV697;X524
本文编号：2448996
[Abstract]:The SWAT (Soil and Water Assessment Tool) hydrological model was established in the upper reaches of Miyun Reservoir, and the parameters of the model were optimized according to the measured water quantity-water quality data. The key areas of soil erosion and pollutants in the watershed were identified, and the effects of different management measures on water quality and water quality of the watershed were quantitatively studied. The results show that the soil erosion intensity in Miyun reservoir basin is concentrated in the area near the river channel in the middle and lower reaches of the basin. The non-point source pollution in Chaohe River basin is serious, the total nitrogen loss superhigh risk areas of Chaohe River and Bai River account for 62.62% and 43.09% of the total area, respectively, and the total phosphorus in the Baihe River Basin is low risk area. The high risk area of total phosphorus loss in Chaohe River basin accounted for 17.81%. Contour tillage and terrace planting have better removal effects on sediment yield and pollutants, in which the reduction rates of sediment yield, total nitrogen and total phosphorus load are 25.16%, 10.79% and 32.89% in tidal river, respectively, and the reduction rates of sediment yield and total nitrogen and total phosphorus load are 25.16%, 10.79% and 32.89% in tidal river, respectively. White River was 47.60%, 34.92% and 53.49%; Through comparing the measures of returning farmland to forest and returning farmland to grassland, the effect of returning farmland to forest is better. The results can provide decision-making basis for soil and water conservation and water environment control in Miyun reservoir basin.
【作者单位】： 北京师范大学水科学研究院水沙科学教育部重点实验室;
【分类号】：TV697;X524
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