January 11, 2017

国际学术报告: Proportionality relationship and water balance model

In this study, a one-parameter Budyko-type model for the long-term water balance is derived based on the proportionality relationship for the one-stage partitioning of mean annual precipitation. Theoretical lower and upper bounds of the new model are identified and validated. The derived one-parameter Budyko model was extended to the annual one and integrated with the GRACE (Gravity Recovery and Climate Experiment) data to reconstruct the historical annual total water storage change for assessing the groundwater depletion in Punjab, Pakistan. Additionally, a four-parameter Budyko equation is derived for mean annual water balance by applying proportionality relationship to two-stage partitioning of mean annual precipitation. The four dimensionless parameters include Horton index (H, defined as the ratio of evaporation to total wetting) and λ (the ratio of initial evaporation to total wetting) for slow runoff, and β (the ratio of initial wetting to total wetting) and γ (the ratio of total wetting to its potential) for fast runoff. Deriving the Budyko models based on the proportionality relationship provides a new interpretation of the water balance model.

报告人: 唐寅, 美国中佛罗里达大学
主持人: 汤秋鸿
时间: 2017年1月12日 下午3点
地点: 地理科学馆411