【摘要】：土壤參數(shù)控制了水和空氣在土壤界面的運動,對區(qū)域內(nèi)水分循環(huán)產(chǎn)生主要影響。三峽庫區(qū)土壤種類眾多,區(qū)域分異明顯,且同一種土壤在不同地區(qū)的理化性質(zhì)也不盡相同。為了能更加精確地模擬庫區(qū)徑流過程,基于SWAT模型,采用了高精度的土壤空間數(shù)據(jù),系統(tǒng)研究了土壤屬性參數(shù)的確定方法,建立了高精度的土壤數(shù)據(jù)庫。用LHOAT方法、SWAT-CUP軟件及SUFI-2算法進行了參數(shù)敏感性分析、參數(shù)率定、模型驗證和不確定性分析,對三峽庫區(qū)2010—2013年的日徑流過程進行模擬。結(jié)果表明:對徑流模擬影響最明顯的5個土壤參數(shù)為SOL_AWC,SOL_Z,SOL_K,SOL_CBN和SOL_BD。6個水文站率定期和驗證期的平均確定性系數(shù)、平均納什效率系數(shù)、平均相對誤差分別為:0.818,0.798,6.778%,流量模擬值與實測值過程線總體擬合程度較好。研究揭示了土壤參數(shù)對徑流模擬的潛在影響作用,為大尺度流域水文模擬和區(qū)域水量平衡研究可提供基礎(chǔ)支持。
[Abstract]:Soil parameters control the movement of water and air at the soil interface and have a major effect on the water circulation in the region. There are many kinds of soils in the three Gorges Reservoir area, the regional differentiation is obvious, and the physical and chemical properties of the same soil are different in different regions. In order to simulate the runoff process of reservoir area more accurately, based on SWAT model, the high precision soil spatial data was adopted, the method of determining soil attribute parameters was studied systematically, and a high precision soil database was established. Using LHOAT method, SWAT-CUP software and SUFI-2 algorithm, the parameter sensitivity analysis, parameter rate determination, model verification and uncertainty analysis are carried out to simulate the daily runoff process in the three Gorges Reservoir area from 2010 to 2013. The results showed that the five soil parameters which had the most obvious effect on runoff simulation were the average deterministic coefficient of SOL_AWC,SOL_Z,SOL_K,SOL_CBN and SOL_BD.6 hydrologic station rate and the average deterministic coefficient of validation period, and the average Nash efficiency coefficient. The average relative error is 0.818 / 0. 798 / 6.778. the overall fitting degree between the simulated flow value and the measured value is good. The study reveals the potential effect of soil parameters on runoff simulation and provides basic support for large-scale basin hydrological simulation and regional water balance research.
【作者單位】： 武漢大學資源與環(huán)境科學學院;
【基金】：國家“十二五”重大科技專項水專項項目“三峽庫區(qū)及上游流域水環(huán)境風險評估與預警技術(shù)研究與示范課題”(2013ZX07503-001)
【分類號】：P333.1

【相似文獻】

相關(guān)期刊論文 前10條

1 李代華;崔東文;;相空間重構(gòu)支持向量機在徑流模擬中的應(yīng)用研究[J];長江科學院院報;2013年10期

2 袁U，

本文編號：2302620