四川农业大学学报 ›› 2011, Vol. 29 ›› Issue (03): 357-364.doi: 10.3969/j.issn.1000-2650.2011.03.012

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基于GIS的柳沟流域场降雨产流模拟

刘李霞, 毕华兴, 许华森, 鲍彪   

  1. 北京林业大学水土保持学院, 北京 100083
  • 收稿日期:2011-05-24 出版日期:2011-09-30 发布日期:2017-04-12
  • 通讯作者: 毕华兴(E-mail:bhx@bjfu.edu.cn) E-mail:bhx@bjfu.edu.cn
  • 基金资助:
    林业公益性行业科研专项经费"典型森林植被对水资源形成过程的调控研究"(201104005);国家自然科学基金"晋西黄土区森林植被对径流的影响及其尺度辨析"(30972419)

Single Rainfall-runoff Simulation of Liugou Basin Based on GIS

LIU Li-xia, BI Hua-xing, XU Hua-sen, BAO Biao   

  1. School of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China
  • Received:2011-05-24 Online:2011-09-30 Published:2017-04-12

摘要: 黄土高原土壤侵蚀问题举世瞩目,已成为黄土高原经济社会发展的主要障碍和主要的生态环境问题,其中以水力侵蚀最为严重,水力侵蚀面积已超过总面积的一半。掌握降雨产流原理及发展规律对从根本上防治水土流失提供科学依据,本文以西北黄土区蔡家川流域柳沟嵌套小流域为研究对象,在GIS平台下进行了水文地形因子的提取,通过改进前人分布式水文模型分别实现了对场强降雨过程的林冠截留、枯落物截留、土壤下渗及产汇流4个过程模型构建和计算,经与观测值对照证明模型具有较高的精度,能较精确地模拟降雨过程中的真实径流量,最后基于GIS实现了对场降雨产流过程的三维虚拟仿真模拟,使以往的降雨过程能进行重演、未来的降雨过程能进行预测,为制定相应的水土保持措施提供了科学的依据。

关键词: DEM, 水文地形因子, 降雨径流模型, 三维模拟, 柳沟流域

Abstract: Soil erosion in the Loess Plateau is stupendous,which has become the main obstacle to economic and social development,and among which water erosion is the most serious as it happens in more than half of the whole land.It can provide scientific basis for preventing loss of water and erosion of soil at the root to learn and grasp the rain-runoff principles and fundamental laws.In this paper,Liugou net watershed of Caijiachuan watershed in the Loess Area in the Western Shanxi Province is taken as the study area.Firstly,hydrological terrain factors are extracted on GIS platform,which shows the exact DEM and the channel location information.Then,the rainfall-runoff model is divided into four stage models-canopy interception,litter interception,soil infiltration and runoff yield and concentration,just as its actual progress.Through improving the predecessors' distributed hydrological models respectively,four stages of the rainfall-runoff model construction and computing work are implemented.At last,single heavy rainfall in Liugou basin is taken to examine the accuracy of the models.The relative error of each step is less than 0.3,and the total error is 0.28.The models can finish the actual simulated rainfall runoff process perfectly.Based on the different runoff volumes of different periods,the three-dimensional virtual simulation of the heavy rainfall-runoff on GIS platform is performed.Using the model and method,the previous rainfall-runoff process can be repeated,and the future can be predicted if the rainfall amount is known.Thus models and simulation can bring scientific reference for the relevant staff members of soil and water conservation to lay down appropriate soil and water conservation measures.

Key words: DEM, hydrological terrain factors, rainfall-runoff model, 3D simulation, Liugou basin

中图分类号: 

  • P208