基于土地利用、土壤类型等信息数据及研究区水文、气象资料，在ArcGIS软件支撑下，应用SCS径流曲线模型对秦皇岛滨海地区不同频率年径流深和年径流总量进行了计算，提出适合该研究区域的CN值，得出秦皇岛市滨海地区典型年丰、平、枯径流深分别为199.13mm、145.64mm、126.08mm，经合理性分析，认为模型结果能较精确地反映研究区实际降水-径流关系。同时利用径流研究结果，对秦皇岛市滨海地区不同水平年径流污染物负荷进行了估算，为秦皇岛市北戴河地区非点源污染时空分布特征模拟及环境治理效果评价研究提供参考。

Based on the land use, soil classification, and hydrological and meteorological data, the SCS model, developed by Soil Conservation Service (SCS), U.S.A., was applied to simulate the annual runoff depth and surface runoff under different frequencies in the platform of ArcGIS in the coastal region of Qinghuangdao and to determine the appropriate value of CN in the area. The results showed that the runoff depths were 194.21mm, 145.64mm, and 126.08mm during the wet, normal, and dry seasons, which can accurately reflect the actual rainfall-runoff relationship in the study area. Meanwhile, the surface runoff results were used to estimate the pollution loads under different runoff conditions in the coastal region of Qinghuangdao, which can provide reference for the simulation of spatial and temporal distribution of non-point source pollution and evaluation of environmental improvement in Beidaihe area of Qinghuangdao.

十二五国家科技支撑计划项目“北戴河近岸海域环境污染成因分析及综合整治效果评价研究”2011BAD25B01.