农田排水系统分布特征对水质净化效果的影响研究

孙少江; 罗纨; 邹家荣; 巫旺; 贾忠华; 张志秀; 朱卫彬

引用本文:	孙少江,罗纨,邹家荣,等.农田排水系统分布特征对水质净化效果的影响研究[J].灌溉排水学报,2019,38(4):122-128.
	SUN Shaojiang,LUO Wan,ZOU Jiarong,et al.农田排水系统分布特征对水质净化效果的影响研究[J].灌溉排水学报,2019,38(4):122-128.

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农田排水系统分布特征对水质净化效果的影响研究
孙少江，罗纨，邹家荣，巫旺，贾忠华，张志秀，朱卫彬
1.扬州大学水利与能源动力工程学院，江苏扬州 225009； 2.扬州市江都区昭关灌区管理处，江苏扬州 225261； 3.扬州市江都区河道管理处，江苏扬州 225200

摘要:

【目的】分析不同排水沟塘系统分布特点对农田排水污染物去除能力的影响。【方法】分别选择陕西省富平县卤泊滩和江苏省扬州市江都区为研究区，通过理论计算，比较了2种不同分布但农田面积比接近的排水沟塘系统的水质净化能力。【结果】①位于南方的江都研究区“小沟多塘”排水系统对于污染物的去除率比卤泊滩地区“大沟无塘”高出7%~36%；②在卤泊滩研究区，污染物降解的主要场所为排水农沟，而在江都研究区，则是面积较大的支沟和池塘；③2个研究区不同类型沟塘对污染物的去除效率都与其面积呈现良好的相关性。【结论】分布特征决定了沟塘水系的水力联系，“小沟多塘”类型分布的排水系统更有利于污染物的降解。

关键词: 农田排水；沟塘系统；水力联系；水质净化；去除率

DOI：10.13522/j.cnki.ggps.20180404

分类号:

基金项目:

Types of Drainage Network Impact Attenuation of Dissolved Contaminants

SUN Shaojiang, LUO Wan, ZOU Jiarong, WU Wang, JIA Zhonghua, ZHANG Zhixiu, ZHU Weibin

1. College of Water Resources and Hydro-power Engineering, Yangzhou University, Yangzhou 225009, China;2. Administrative Office of Yanyun Irrigation Area in Jiangdu District, Yangzhou 225261, China;3. River Management Office of Jiangdu District, Yangzhou 225200, China

Abstract:

【Objective】 The overarching objective of this paper is to experimentally examine the impact of drainage network types on attenuation of agricultural pollutants. 【Method】 The comparative experiments were conducted at two sites: One was Lubotan at Fuping in Shaanxi province where the drainage system was ditches, and the other one was Jiangdu at Yangzhou in Jiangsu province where the drainage system was combination of ponds and a small number of small ditches. For each site, we analyzed the removal rate of agrochemical contaminants.【Result】 The system at Jiangdu site was 7%~36% more efficient than that at Lubotan site in removing agrochemical pollutants. At Lubotan, the contaminants were mainly degraded in the ditches, while at Jiangdu, the contamination attenuation occurred in ponds and large ditches. On both sites, contamination attenuation was positively related to the areas of the ditch and the ponds. 【Conclusion】 Drainage network types control retention time of pollutants, and those with more ponds and a number of small ditches are more efficient in degrading pollutants.

Key words: farmland drainage; diches and ponds system; hydraulic condition; water quality improvement; removal efficiency