ABSTRACT

With the development of landscape ecology and hydrology, the research in relationship between landscape pattern changes and hydrological process is pushed into a further level, and also to proposed a higher request to the development of related models. The SWAT-VRR model (Soil and Water Assessment Tool with Vegetation Runoff Regulation) is a distributed hydrological model to better show the effect of land use landscape change on hydrological processes. The Qihe watershed in Danjiangkou reservoir area was selected in a case study, and the applicability of SWAT-VRR was verified firstly, then set up two typical water-soil conservation scenario simulations to analyze the response to landscape pattern changes under SWAT-VRR. The results indicate that, the SWAT-VRR model achieved a notable improvement in monthly and daily hydrological simulation comparing to the SWAT model (Soil and Water Assessment Tool) simulation during 2003 to 2006. Compared with the two land use scenarios, the 300 m forest riparian along the Qihe River can adjust the runoff more effectively than the area greater than 15° is forest, and show a strong stability in water-soil conservation effect during different rainfall. The SWAT-VRR provides a more accurate scientific basis to estimate landscape pattern change on stream flow.

摘要

随着景观生态学和水文学的发展，将景观格局变化与水文过程关系的研究推向了更高的层次，也对相关模型的发展提出了更高的要求。SWAT-VRR 模型（具有植被径流调节功能的土壤和水评估工具）是一种分布式水文模型，可以更好地显示土地利用景观变化对水文过程的影响。以丹江口库区齐河流域为例，首先验证了SWAT-VRR的适用性，然后建立了两个典型的水土保持情景模拟，分析了SWAT-VRR对景观格局变化的响应。结果表明，SWAT-VRR 模型与 2003 年至 2006 年期间的 SWAT 模型（土壤和水评估工具）模拟相比，在月度和日度水文模拟方面取得了显着改善。 与两种土地利用情景相比，齐河沿岸 300 m 森林河岸比大于 15°的区域为森林能更有效地调节径流，并且在不同降雨期间表现出较强的水土保持效果稳定性。SWAT-VRR 为估计河流流量的景观格局变化提供了更准确的科学依据。不同降雨量下水土保持效果均表现出较强的稳定性。SWAT-VRR 为估计河流流量的景观格局变化提供了更准确的科学依据。不同降雨量下水土保持效果均表现出较强的稳定性。SWAT-VRR 为估计河流流量的景观格局变化提供了更准确的科学依据。