The Xinanjiang Model

3.1 Introduction

The Xinanjiang model was developed in 1973 and published in 1980 (Zhao et al., 1980). Its main feature is the concept of runoff formation on repletion of storage, which means that runoff is not produced until the soil moisture content of the aeration zone reaches field capacity, and thereafter runoff equals the rainfall excess without further loss. This hypothesis was first proposed in China in the 1960s, and much subsequent experience supports its validity for humid and semi-humid regions. According to the original formulation, runoff so generated was separated。。。

新安江模型

3.1 引言

新安江模型于1973年開發(fā)，1980年正式發(fā)表。其特點(diǎn)在于采用了蓄滿產(chǎn)流的概念，這意味著當(dāng)包氣帶的土壤含水量達(dá)到田間持水量時(shí)才會(huì)產(chǎn)生徑流，隨后降雨流量將不會(huì)有進(jìn)一步的損失。這一假設(shè)于60年代在中國首次提出，隨后的許多實(shí)驗(yàn)證實(shí)了其在濕潤及半濕潤地區(qū)的有效性。根據(jù)原始公式，按照霍頓穩(wěn)定下滲率的概念，產(chǎn)生的徑流被分為兩部分。假定下滲水以地下水的形式存儲(chǔ)起來，其余的則留在地表成為徑流。然而，穩(wěn)定下滲率分布并不均勻，并且與各子流域的出口斷面流量相關(guān)的單位線也是變化的，這說明了劃分。。。