资料短缺地区径流模拟研究

以柬埔寨洞里萨湖流域为对象,基于多源降水信息分析、水文模型构建及适应性分析、参数移植研究及检验等,探讨了资料短缺地区的径流模拟问题。结果表明:气候再分析资料集Ag MERRA在洞里萨湖地区的精度较高,VIC模型在该区域的适应性较好,可以用来进行水文模拟;水文模型参数与流域气候和下垫面因子的相关性较好,拟合优度R2都在0. 65以上,移植的可信度较高;在3个验证流域的实测径流过程对比分析表明,基于参数移植方案构建的水文模型能较好地模拟资料短缺地区的流域水文过程。

Runoff simulation study in ungauged areas

Taking Tonle Sap Lake in Cambodia as an object, we discussed the runoff simulation in ungauged areas based on multi-source precipitation information analysis, hydrological model construction and adaptability analysis, parameter transplant research and verification, etc. The results showed that the accuracy of climate reanalysis dataset AgMERRA in Tonle Sap Lake region and the adaptability of VIC model in this area were both satisfied, and they could be used for hydrological simulation in the area. The hydrological model parameters have good correlations with the basin climate and underlying surface factors with the R2 above 0.65 and the transplantation reliability are acceptable. The comparative analysis of the simulated and observed runoff process for three validating catchments indicated that the hydrological model based on parameter transplantation scheme could simulate the hydrological process of the basin in ungauged areas well.