Parameter Transferability of Monthly Scale Hydrological Model Influenced by El Niño-Southern Oscillation

Abstract:

This paper, taking three watersheds in Zhejiang Province as the study objects, uses two models, i.e., the monthly water balance model with two parameters (XM model) and four parameters (ABCD model) to analyze the interval characteristics of hydrological simulation uncertainty in combination with the multiple objective functions of the GLUE method. It studies and analyzes the parameter transferability of different hydrological models under ENSO (El Nin?o Southern Oscillation) and different basin geographical conditions. The results show that the simulation effect of parameter transferability from El Nin?o period to La Nin?a period is better than that from La Nin?a period to El Nin?o period, the pass rate of the model with fewer parameters (XM model) is better than that of the model with more parameter (ABCD model). In addition, the effect of parameter transferability between adjacent watersheds is significantly better than that of remote watersheds, and the ABCD model has a better ability for spatial scale parameter transferability.

Key words:hydrological model;parameter transferability;monthly scale;ABCD model;El Niño-Southern Oscillation