中国科学院生态环境研究中心机构知识库
Advanced  
RCEES OpenIR  > 城市与区域生态国家重点实验室  > 学位论文
题名: 平原河网污染物降解系数的初步研究
作者: 冯 帅1
学位类别: 硕士
答辩日期: 2017-06
授予单位: 中国科学院大学
授予地点: 北京
导师: 李叙勇
关键词: 综合降解系数,生物降解系数,水力校正,净入河强度 ; comprehensive degradation coefficient, biodegradation coefficient, hydraulic revision, net input strength
其他题名: A Preliminary Study on the Pollutant Degradation Coefficient in Plain Rivers
学位专业: 环境工程
中文摘要: 由于人类活动的影响,地表水污染加剧,我国正面临着严重的水环境问题。 尤其是近年来,太湖水污染引起的水质安全问题日益严重,太湖流域的水环境治 理对于长三角地区的经济发展和社会稳定意义重大。在制定流域水质目标管理方 案时,水质模型被广泛用于预测治理效果,是流域水环境治理的重要工具。污染 物降解系数是水质模型的关键参数之一,其取值的合理性与水质模型预测的可靠 性紧密相关。为给太湖流域水质目标管理平台的研制与应用提供参数支撑,本文 从三个方面对太湖西部平原河网的污染物降解系数进行研究:(1)开展原位观测 实验估算高锰酸盐指数(CODMn)、氨氮(NH3-N)、总氮(TN)和总磷(TP) 的综合降解系数和生物降解系数,并分析生物降解在污染物综合降解中的作用; (2)根据原位观测实验河段的水力条件对综合降解系数进行水力校正,通过比 较水力校正前后的综合降解系数评估水动力条件对污染物综合降解系数的影响; (3)基于质量守恒构建模型估算京杭大运河镇江-常州段 CODMn、NH3-N、TN 和 TP的净入河强度,并分析污染物净入河强度的空间异质性与季节差异性。 本文的主要结论如下: (1)太湖西部平原河网污染物的综合降解系数具有明显的空间异质性。 CODMn、NH3-N、TN和 TP综合降解系数的季节平均值依次为 0.0646-0.1835d-1、 0.0593-0.1875 d-1、0.0538-0.1303 d-1和 0.1046-0.3444 d-1,四种水质指标综合降解 系数的空间差异性大小顺序为:TN > NH3-N > TP > CODMn。CODMn和 TP综合 降解系数的季节平均值与其季节平均浓度具有显著的正相关趋势,NH3-N综合降 解系数的季节平均值与亚硝态氮(NO2--N)季节平均浓度具有显著的负相关趋势, 而 TN综合降解系数的季节平均值与硝态氮(NO3--N)季节平均浓度具有显著的 正相关趋势。 (2)太湖西部平原河网污染物的生物降解系数具有明显的空间异质性。 CODMn、NH3-N、TN和 TP生物降解系数的季节平均值依次为 0.0240-0.1618d-1、 0.0139-0.1237 d-1、0.0102-0.0555d-1和 0.0308-0.1330d-1,四种水质指标综合降解 系数的空间差异性大小顺序为:CODMn > NH3-N > TN > TP。TN生物降解系数 的季节平均值与其季节平均浓度具有显著的正相关趋势。 (3)污染物的综合降解系数和生物降解系数具有显著的季节性差异。春季 和冬季的 CODMn综合降解系数显著高于夏季和秋季(p<0.05),冬季 TN 和 TP 的综合降解系数均显著高于其它季节(p<0.05)。春季的 CODMn生物降解系数显 著高于夏季(p<0.05),冬季的 TN 生物降解系数显著高于其它季节(p<0.05), 春季和冬季的 TP生物降解系数显著高于夏季和秋季(p<0.05)。任意两个季节间 NH3-N的综合降解系数和生物降解系数未具有显著性差异。 (4)生物降解在不同污染物综合降解中的作用大小存在差异。 CODMn、 NH3-N、TN 和 TP 生物降解系数与综合降解系数比值的季节平均值依次为 49.44±8.15%、47.35±11.64%、47.38±12.33%和 40.00±10.19%。生物降解在 CODMn 综合降解中的作用显著高于 TPp<0.05)。 (5)不同季节水力校正后 CODMn、NH3-N、TN和 TP的综合降解系数比水 力校正前略有增大但两者未显示出显著差异,表明太湖西部平原河网的水动力条 件对污染物的综合降解系数影响较小。 (6)京杭大运河污染物的净入河强度因季节、河段和污染物类别的不同存 在较大差异。上半年镇江地区需要加强含氮污染物的入河控制,常州地区加强耗 氧污染物和含磷污染物的入河控制。秋季常州地区是控制京杭大运河镇江 -常州 段水污染的关键地区。冬季两个地区均需要加强耗氧污染物、含氮污染物和含磷 污染物的入河控制以改善京杭大运河的水质。 本研究不仅可为太湖西部平原河网污染物的水环境容量核算提供关键参数, 还可为太湖流域水质目标管理平台的研制与应用提供参数支撑,具有重大的理论 和实践意义。
英文摘要: Because of the influence of anthropogenic activity, surface water pollution is aggravating, and our country is faced with a serious water environment problem. Especially in recent years, water quality security induced by water pollution is more and more serious in Taihu Lake, and water environment treatment in Taihu Lake watershed is of great significance to economy development and social stability in the Yangtze River Delta. In developing water quality target management plan in watershed, water quality models are widely used in predicting treatment effect and they are key tools in water environment treatment. Pollutant degradation coefficient is one of key parameters of water quality models, and the rationality of its value is closely related to predicting reliability of water quality models. To provide parameter support for development and application of water quality target management platform of Taihu Lake watershed, pollutant degradation coefficient of plain rivers in the west of Taihu Lake was studied from three aspects: (1) the comprehensive degradation coefficient and biodegradation coefficient of the permanganate index (CODMn), ammonia (NH3-N), total nitrogen (TN) and total phosphorus (TP) were measured through on-site experiment and the role of biodegradation in pollutant comprehension degradation was also analyzed; (2) hydraulic revision was conducted for the comprehensive degradation coefficient according to hydraulic conditions of the on-site experiment rivers. By comparing the comprehensive degradation coefficient before and after hydraulic revision, influence of hydrodynamic condition on the comprehensive degradation coefficient was assessed; (3) net input strength of CODMn, NH3-N, TN and TP in the Zhenjiang - Changzhou section of the Great Canal were measured through a building model based on mass balance, and spatial heterogeneity and seasonal variability of pollutant net input strength were analyzed. The main conclusions are as following: (1) Spatial heterogeneity was significant in pollutant comprehensive degradation coefficient of plain rivers in the west of Taihu Lake. Seasonal mean of comprehensive degradation coefficient of CODMn, NH3-N, TN and TP were 0.0646 - 0.1835d-1, 0.0593 - 0.1875 d-1, 0.0538 - 0.1303 d-1 and 0.1046 - 0.3444 d-1, respectively. The order of spatial heterogeneity in comprehensive degradation coefficient of the four water quality indicators was TN > NH3-N > TP > CODMn. Seasonal mean of comprehensive degradation coefficient of CODMn and TP and their seasonal mean concentration was significant positive correlated; and seasonal mean of comprehensive degradation coefficient of NH3-N and nitrate (NO2--N) seasonal mean concentration was significant negative correlated; and seasonal mean of comprehensive degradation coefficient of TN and nitrite (NO3--N) seasonal mean concentration was significant positive correlated. (2) Spatial heterogeneity was significant in pollutant biodegradation coefficient of plain rivers in the west of Taihu Lake. Seasonal mean of biodegradation coefficient of CODMn, NH3-N, TN and TP were 0.0240 - 0.1618d-1, 0.0139 - 0.1237 d-1, 0.0102 - 0.0555d-1and 0.0308 - 0.1330d-1, respectively. The order of spatial heterogeneity in biodegradation coefficient of the four water quality indicators was CODMn > NH3-N > TN > TP. Seasonal mean of biodegradation coefficient of TN and its seasonal mean concentration was significant positive correlated. (3) Seasonal variability was significant in pollutant comprehensive degradation coefficient and biodegradation coefficient tof plain rivers in the west of Taihu Lake. Comprehensive degradation coefficient of CODMn in spring and winter was significant higher than that in summer and autumn (p<0.05), and comprehensive degradation coefficient of TN and TP in winter was both significant higher than that in other seasons (p<0.05). Biodegradation coefficient of CODMn in spring was significant higher than that in summer (p<0.05), and biodegradation coefficient of TN in winter was significant higher than that in other seasons (p<0.05), and biodegradation coefficient of TP in spring and winter was significant higher than that in summer and winter (p<0.05). There was no significant seasonal variability in comprehensive degradation coefficient and biodegradation coefficient of NH3-N between any two seasons. (4) The role of biodegradation in comprehensive degradation was different for different pollutants. Seasonal mean proportion of biodegradation coefficients to comprehensive degradation coefficients for CODMn, NH3-N, TN and TP were 49.44 ± 8.15%, 47.35 ± 11.64%, 47.38 ± 12.33% and 40.00 ± 10.19%, respectively. The role of biodegradation in comprehensive degradation of CODMn was significant higher than that of TP (p<0.05). (5) Comprehensive degradation coefficient of CODMn, NH3-N, TN and TP after hydraulic revision in different seasons was higher than that before hydraulic revision but no significant difference occurred after hydraulic revision, which suggests hydrodynamic condition of plain rivers in the west of Taihu Lake does not make a difference on comprehensive degradation coefficients. (6) Pollutant net input strength in the Zhenjiang - Changzhou section of the Great Canal varies among different seasons, different river sections and different pollutants. In the first half year, controlling of nitrogen pollutant discharged to river in Zhenjiang district and controlling of oxygen-demand pollutant and phosphorus pollutant discharged to river in Changzhou district should be reinforced. In autumn, Changzhou district was the key region to controle water pollution in the Zhenjiang - Changzhou section of the Great Canal. And in winter, controlling of oxygen-demand pollutant, nitrogen pollutant and phosphorus pollutant discharged to river should be reinforced in both Zhenjiang district and Changzhou district to improve water quality of the Great Canal. This research is of great theoretical and practical significance, it can not only provide key parameter for water capacity calculation of pollutant of plain rivers in the west of Taihu Lake, but also provide parameter support for development and application of water quality target management platform of Taihu Lake watershed.
内容类型: 学位论文
URI标识: http://ir.rcees.ac.cn/handle/311016/38620
Appears in Collections:城市与区域生态国家重点实验室_学位论文

Files in This Item:
File Name/ File Size Content Type Version Access License
冯帅--平原河网污染物降解系数的初步研究.pdf(10446KB)学位论文--限制开放 联系获取全文

作者单位: 1.中国科学院生态环境研究中心
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[冯 帅]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[冯 帅]‘s Articles
Related Copyright Policies
Null
Social Bookmarking
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit
所有评论 (0)
暂无评论
 
评注功能仅针对注册用户开放,请您登录
您对该条目有什么异议,请填写以下表单,管理员会尽快联系您。
内 容:
Email:  *
单位:
验证码:   刷新
您在IR的使用过程中有什么好的想法或者建议可以反馈给我们。
标 题:
 *
内 容:
Email:  *
验证码:   刷新

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.

 

 

Valid XHTML 1.0!
Copyright © 2007-2018  中国科学院生态环境研究中心 - Feedback
Powered by CSpace