Simulation of Daily Runoff and Sediment Load in Taoxi Watershed Based on AnnAGNPS Model

ZHONG Keyuan; CHEN Ying; CHEN Xingwei; LIU Meibing

doi:10.13961/j.cnki.stbctb.2015.06.022

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Simulation of Daily Runoff and Sediment Load in Taoxi Watershed Based on AnnAGNPS Model

- Simulation of Daily Runoff and Sediment Load in Taoxi Watershed Based on AnnAGNPS Model
- Bulletin of Soiland Water Conservation Vol. 35, Issue 6, Pages: 130-134(2015)
- 作者机构：
  
  1. 福建师范大学地理科学学院,福建,福州,350007
  2. 湿润亚热带山地生态国家重点实验室培育基地,福建,福州,350007
  3. 福建省陆地灾害监测评估工程技术研究中心,福建,福州,350007
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.06.022
  CLC：
- Published：2015
- 稿件说明：
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ZHONG Keyuan, CHEN Ying, CHEN Xingwei, et al. Simulation of Daily Runoff and Sediment Load in Taoxi Watershed Based on AnnAGNPS Model[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 130-134.
DOI：

ZHONG Keyuan, CHEN Ying, CHEN Xingwei, et al. Simulation of Daily Runoff and Sediment Load in Taoxi Watershed Based on AnnAGNPS Model[J]. Bulletin of Soiland Water Conservation, 2015, 35(6): 130-134. DOI： 10.13961/j.cnki.stbctb.2015.06.022.

摘要

[目的

]

以中国东南沿海桃溪流域为研究对象

构建该流域日尺度产流产沙的农业非点源污染模型(annualized agricultural non-point source pollution model

AnnAGNPS)

以期为流域水土流失治理与水土资源合理配置分析支持。[方法

]

采用DSA(differential sensitivity analysis)方法

分析流域敏感性参数

并建立研究区日尺度的AnnAGNPS模型。[结果

]

(1) CN值(curve number)、土壤有效含水量和沟道曼宁系数为径流敏感性参数

土壤可侵蚀因子K、地表残留物覆盖率、年根系生物量、耕作后地面残留物覆盖率、随机粗糙率、沟道曼宁系数和耕作扰动面积为输沙量的主要敏感性参数;(2)模型对日尺度径流模拟的R

Ens系数均大于0.66

日尺度泥沙模拟的R

Ens系数均大于0.62。[结论

]

AnnAGNPS模型能够较好地模拟桃溪流域日尺度产流产沙规律。

Abstract

[Objective] Daily runoff and sediment process in Taoxi watershed in the Southeast of China were simulated to provide a support for soil and water conservation plan.[Methods] The annualized agricultural non-point source pollution model(AnnAGNPS) was adopted to simulate the daily runoff and sediment yield. Differential sensitivity analysis(DSA) methods were carried out to evaluate the sensitivity of input parameters.[Results] (1) Curve number

field capacity and Maning's-reach were the sensitive parameters for runoff simulation. K-factor

surface residue cover

root-mass

remained residue cover after cultivation

random roughness

Maning's-reach and disturbed area were the major sensitive parameters for sediment load estimation.(2) In the calibration and validation processes of both runoff and sediment simulation

R2 and Ens had values above 0.66 for daily runoff and were above 0.62 for daily sediment load modeling.[Conclusion] AnnAGNPS model can simulate well for daily runoff and sediment process in the study area.

关键词

Keywords

references

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