CMADS在霍童溪流域SWAT模型径流模拟中的应用研究

Applicability of CMADS in Runoff Simulation of Huotong River Basin Based on SWAT Model

中国东南沿海山区中小流域同样存在气象数据稀缺问题,导致流域水文模型研究受限。中国大气同化驱动数据集(CMADS)是一类可获得再分析气象数据集,用于填补水文模型数据空缺,研究其在SWAT径流模拟中的适用性显得尤为重要。以福建霍童溪流域为研究区,以测站数据为参照,通过数据一致性评价、SWAT模型径流模拟的检验系数以及水文要素空间分布对CMADS进行适用性评价。研究结果表明:两类数据降水空间分布一致,温度数据相关性较高;CMADS和测站数据在月、日尺度SWAT模型径流模拟中R^(2)和NSE系数均达到了较好的结果;CMADS模式水文相关分量与测站模式偏差较小且空间分布一致,CMADS数据集在东南沿海代表性流域径流模拟有较好的适用性。

The scarcity of meteorological data leads to the limitation of hydrological model research,which also exists in small and medium-sized rive basins along the southeastern coastal areas of China.The China meteorological assimilation dataset(CMADS)is the available meteorological dataset,which aims to filling the gap of data scarcity in hydrological model.Therefore,it is particularly important to verify the applicability of this dataset in runoff simulation based on SWAT model.Taking the Fujian Huotong River basin as the object,and the data of the survey station as the reference,this paper evaluates the applicability of CMADS by using the data consistency evaluation,the test coefficient of runoff simulation based on SWAT model and the spatial distribution of hydrological elements.The results show that:The spatial distribution of precipitation in the two types of data is consistent,and the correlation of temperature data is high.The R^(2) and NSE coefficients of the monthly and daily runoff simulation results based on SWAT model obtained from the CMADS and the survey stations are satisfactory.The hydrological components of the CMADS model have little deviation from that of the survey station with consistent spatial distribution.Therefore,it can be concluded that the CMADS has good applicability in the runoff simulation of representative river basins along the southeast coastal area of China.