Effects of Climate Change Scenarios on Non-point Source Pollution Load on Shaanxi Section of Weihe River Basin

LIU Jikai; WAN Tian; CHENG Wen; REN Jiehui; CHEN Yao

doi:10.13961/j.cnki.stbctb.2018.04.013

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Effects of Climate Change Scenarios on Non-point Source Pollution Load on Shaanxi Section of Weihe River Basin

- Effects of Climate Change Scenarios on Non-point Source Pollution Load on Shaanxi Section of Weihe River Basin
- Bulletin of Soiland Water Conservation Vol. 38, Issue 4, Pages: 82-86(2018)
- 作者机构：
  
  1. 西安理工大学省部共建西北旱区生态水利国家重点实验室,陕西,西安,710048
  2. 中国科学院青藏高原研究所,北京,100101
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.04.013
  CLC：
- Published：2018
- 稿件说明：
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LIU Jikai, WAN Tian, CHENG Wen, et al. Effects of Climate Change Scenarios on Non-point Source Pollution Load on Shaanxi Section of Weihe River Basin[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 82-86.
DOI：

LIU Jikai, WAN Tian, CHENG Wen, et al. Effects of Climate Change Scenarios on Non-point Source Pollution Load on Shaanxi Section of Weihe River Basin[J]. Bulletin of Soiland Water Conservation, 2018, 38(4): 82-86. DOI： 10.13961/j.cnki.stbctb.2018.04.013.

摘要

[目的]在全球气候变暖的背景下，探讨气候条件变化对渭河流域陕西段非点源污染负荷的影响，旨在为流域综合治理措施提供依据，从而缓解气候变化对水环境的不利影响。[方法]基于非点源污染分布式模拟模型（SWAT模型），分别对2020，2030和2050年气温和降雨等气候因子变化下渭河流域陕西段径流及非点源污染负荷进行模拟，探讨了气候变化对该流域径流及水体中氮、磷年均负荷的影响。[结果]①气候变化对流域径流量影响较大。随着未来气温升高降雨增加的共同作用下，径流量增加；到2050年，在平均气温增加2.2℃，降雨量增加7%的情况下，渭河陕西段径流量将增加11.9%。②在未来气候变化的影响下，流域年均总氮负荷增加20.9%；总磷负荷增加13.3%。[结论]未来气温升高和降雨增多的气候变化共同作用下，河道径流量增加，总氮、总磷负荷增多，农业非点源污染问题越来越突出。

Abstract

[Objective] In the background of global warming

the impact of climate changes on non-point source pollution load in Shaanxi section of Weihe River Basin was discussed in order to provide a basis for comprehensive river basin management measures

and the adverse effects of climate changes on water environment can be mitigated.[Methods] Based on the non-point source pollution distributed simulation model (SWAT model)

the runoff and non-point source pollution loads in Shaanxi section of Weihe River Basin were simulated under the changes of climate factors such as temperature and rainfall in 2020

2030 and 2050

respectively. The impacts of climate change on runoff and average annual loads of nitrogen(N) and phosphorus(P) in water were analyzed.[Results] ① Climate changes had a great influence on runoff in Weihe River Basin. The runoff increased with the future climate changes due to the increased temperature and precipitation. By 2050

in the case of the mean temperature increased by 2.2℃ and the rainfall increased by 7%

the runoff in the Weihe River will increased by 11.9%

which were comparing with the temperature

rainfall and runoff in 2012. ② Under the influence of the rising temperature and increasing in the future

the annual average total phosphorus load will increase. By 2050

in the case of the average temperature increased by 2.2℃ and the annual rainfall increased by 7%

the average annual nitrogen load in the basin increased by 20.9% and the total phosphorus load increased by 13.3%

which were comparing with 2012.[Conclusion] Under the future climate changes with the coefficient of rainfall increase and warming

the runoff of the river increased

and the total load of N and P in water environment increased

which will result in a rather serious problem of agricultural non-point source pollution.

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