Water Quality Change Before and After Comprehensive Treatment in Shaanxi Section of Weihe Main Stream

HU Dexiu; LI Li; ZHANG Yan; XIONG Jianglong

doi:10.13961/j.cnki.stbctb.2018.05.015

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Water Quality Change Before and After Comprehensive Treatment in Shaanxi Section of Weihe Main Stream

- Water Quality Change Before and After Comprehensive Treatment in Shaanxi Section of Weihe Main Stream
- Bulletin of Soiland Water Conservation Vol. 38, Issue 5, Pages: 91-96(2018)
- 作者机构：
  
  西安理工大学西北旱区生态水利工程国家重点实验室,陕西,西安,710048
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.05.015
  CLC： X824
- Published：2018
- 稿件说明：
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HU Dexiu, LI Li, ZHANG Yan, et al. Water Quality Change Before and After Comprehensive Treatment in Shaanxi Section of Weihe Main Stream[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 91-96.
DOI：

HU Dexiu, LI Li, ZHANG Yan, et al. Water Quality Change Before and After Comprehensive Treatment in Shaanxi Section of Weihe Main Stream[J]. Bulletin of Soiland Water Conservation, 2018, 38(5): 91-96. DOI： 10.13961/j.cnki.stbctb.2018.05.015.

摘要

[目的

]

讨论渭河干流陕西段综合整治项目启动以来河道水质的变化趋势，检验整治工程的治理成效，为后续河道的污染防治提供一定技术支持。[方法

]

基于2010—2016年渭河干流陕西段主要监测断面的水质数据进行水质综合评价，应用Mann-Kendall检验法阐述水质变化趋势，运用重标极差分析法（R/S分析法）查明水质的未来变化趋势。[结果

]

2016年渭河干流陕西段河道水污染已由2010年的重度污染转为轻度污染，劣Ⅴ类水质断面比例减少了58.8%，Ⅳ—Ⅴ类断面比例增加了55.5%，Ⅰ—Ⅲ类断面占比保持平稳；宝鸡市、咸阳市、西安市和渭南市4个出境断面枯水期化学需氧量（COD）、NH

-N浓度普遍高于丰水期，治理后西安市出境断面污染削减最为显著，但是西安市出境断面仍然是4个断面中污染最为严重的断面；4个出境断面NH

-N浓度均呈现高度显著下降趋势且未来持续性较强；咸阳、西安、渭南市出境断面COD浓度呈显著下降趋势，但是未来持续性较弱，宝鸡市出境COD浓度呈不显著上升趋势且会延续。[结论

]

综合治理后，河道污染程度明显减轻，水质变化明显，但部分断面污染物浓度有上升趋势，需引起特别关注。

Abstract

[Objective] To explore the trend of water quality since the start of the comprehensive regulation project in Shaanxi section of the main stream of Weihe River

in order to check the effectiveness of regulation works and provide technical support for subsequent river pollution prevention and control.[Methods] Based on the water quality data of the main monitoring points in Shaanxi section of the Weihe River main stream during 2010-2016

the temporal and spatial variation characteristics of water quality were analyzed

the trend of water quality was expounded by using Mann-Kendall test

and the future trend of water quality was identified by using R/S analytical method.[Results] From 2010 to 2016

the water pollution had changed from severe pollution to mild pollution. The chemical oxygen demand(COD) and NH3-N concentrations of 4 exit monitoring points in Baoji

Xianyang

Xi'an and Weinan cities during the dry season were generally higher than those in the flood season. After the treatment

the decrease of the pollution in Xi'an City exit section was the most significant

but still was the most polluted section. The concentration of NH3-N in Baoji

Xianyang

Xi'an and Weinan cities showed a significant downward trend

and this trend would continue. The concentration of COD in Xianyang

Xi'an and Weinan City showed a significant downward trend

but the future sustainability was weak. The increasing trend of COD concentration in Baoji City was not significant.[Conclusion] After the comprehensive treatment

the pollution level of the river is obviously reduced and the water quality is changed obviously. However

the concentration of pollutants in some sections shows an upward trend

which needs special attention.

关键词

Keywords

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