ZHAO Jiajing,ZHANG Wanshun,WANG Yonggui,et al.Runoff Simulation Based on a High-Precision Soil Database in the Three Gorges Reservoir Catchment[J].Research of Soil and Water Conservation,2017,24(03):45-52,58.
基于较高精度土壤库的三峡水库汇水区径流模拟
- Title:
- Runoff Simulation Based on a High-Precision Soil Database in the Three Gorges Reservoir Catchment
- 分类号:
- P334+.92;TV121
- 摘要:
- 土壤参数控制了水和空气在土壤界面的运动，对区域内水分循环产生主要影响。三峡库区土壤种类众多，区域分异明显，且同一种土壤在不同地区的理化性质也不尽相同。为了能更加精确地模拟库区径流过程，基于SWAT模型，采用了高精度的土壤空间数据，系统研究了土壤属性参数的确定方法，建立了高精度的土壤数据库。用LH-OAT方法、SWAT-CUP软件及SUFI-2算法进行了参数敏感性分析、参数率定、模型验证和不确定性分析，对三峡库区2010—2013年的日径流过程进行模拟。结果表明：对径流模拟影响最明显的5个土壤参数为SOL_AWC，SOL_Z，SOL_K，SOL_CBN和SOL_BD。6个水文站率定期和验证期的平均确定性系数、平均纳什效率系数、平均相对误差分别为：0.818，0.798，6.778%，流量模拟值与实测值过程线总体拟合程度较好。研究揭示了土壤参数对径流模拟的潜在影响作用，为大尺度流域水文模拟和区域水量平衡研究可提供基础支持。
- Abstract:
- Soil parameters control the movement of air and water in the soil slope, and have the major influence on regional water cycle. Soil types in the three Gorges Reservoir Region are numerous, and there are obvious differences among them. In addition, physical and chemical properties of the same soil are not identical in different regions. In order to simulate the runoff process of the reservoir region more accurately, we studied the best method of determining soil attribute data based on SWAT model, and established a high-precision soil database combining the attribute data and a high precise spatial data. We simulated the daily runoff process from 2010 to 2013 of the Three Gorges Reservoir Region. LH-OAT method, SWAT-CUP and SUFI-2 were used for sensitivity analysis, calibration, validation and uncertainty analysis. The results showed that the top 5 sensitive soil parameters are SOL_AWC, SOL_Z, SOL_K, SOL_CBN and SOL_BD. The mean coefficient of determination, Nash-Sutcliffe efficiency coefficient and absolute percentage error were 0.818, 0.798, and 6.778%, respectively. The model performed well in simulating runoff process and the result was accurate. This research reveals the potential influence of soil parameters during the process of runoff simulation, and provides important basic support for hydrological simulation in large-scale watersheds and regional water balance research.
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备注/Memo
收稿日期:2016-10-11;改回日期:2016-10-26。
基金项目:国家“十二五”重大科技专项水专项项目“三峡库区及上游流域水环境风险评估与预警技术研究与示范课题”（2013ZX07503-001）
作者简介:赵佳婧(1991-),女,山西临汾人,硕士研究生,研究方向为流域水文水资源与环境。E-mail:1159818347@qq.com
通讯作者:张万顺(1965-),男,甘肃宁县人,教授,博士生导师,主要从事水环境管理及水环境模拟等方面的研究。E-mail:wszhang@whu.edu.cn