Stochastic Environmental Research and Risk Assessment ( IF 4.2 ) Pub Date : 2020-10-14 , DOI: 10.1007/s00477-020-01896-9 Xiaoting Wei , Shengzhi Huang , Qiang Huang , Guoyong Leng , Hao Wang , Li He , Jing Zhao , Dong Liu
Abstract
It is important to investigate watershed water-energy balance dynamics and their interactions and feedbacks with hydro-meteorological factors and underlying surface characteristics, to enhance the understanding of the complex interrelationships among the water, energy, soil, and biosphere cycles. In this study, the single parameter Budyko equation was used. The Budyko equation represents the water-energy balance, and the parameter n represents all the characteristics in the system that affect the partition of precipitation (P) into runoff (R) and evapotranspiration (E). The dynamics of the n in watersheds were studied. The Granger causality was adopted to explore the interactions between n and various influencing factors including hydro-meteorological factors and underlying surface characteristics. Two basins located in the Loess Plateau were selected as a case study. The results indicated that (1) the n of the Jing River Basin (JRB) has a continuous increasing trend and that of the Beiluo River Basin has a continuous decreasing trend; (2) there are strong interplays between n and R, the aridity index (Ep/P), and evaporative ratio (E/P) in both watersheds; (3) soil moisture interacts with R and E/P, thereby unidirectionally influencing the n in both watersheds; and (4) the effective irrigation area interacts with n through its strong impacts on E/P and EP/P in the JRB.
Graphic abstract
中文翻译:
识别流域水能平衡动力学,水文气象因素和潜在地表特征之间的相互作用和反馈
摘要
重要的是研究流域水能平衡动力学及其与水文气象因素和潜在地表特征的相互作用和反馈,以增进对水,能量,土壤和生物圈循环之间复杂相互关系的理解。在这项研究中,使用了单参数Budyko方程。Budyko方程表示水-能量平衡,参数n表示系统中影响降水(P)分配为径流量(R)和蒸散(E)的所有特征。研究了流域中n的动力学。格兰杰因果关系被采用来探索n之间的相互作用各种影响因素,包括水文气象因素和潜在的地表特征。案例研究选择了位于黄土高原的两个盆地。结果表明:(1)荆河流域(JRB)n呈持续上升趋势,北洛河流域n呈持续下降趋势;(2)在两个流域中,n与R,干旱指数(Ep / P)和蒸发比(E / P)之间存在很强的相互作用;(3)土壤水分与R和E / P相互作用,从而单方面影响两个流域中的n;(4)有效灌溉区通过对JRB中E / P和E P / P的强烈影响而与n相互作用。