本文主要研究内容
作者吴燕霞（2019）在《雨源型城市河流水质变化规律及其模拟研究》一文中研究指出：我国南方雨源型城市河流,源短流急,水环境容量小,在区域经济和社会高速发展的背景下,往往担负了过重的污染负荷,呈现出明显的“微容量、重负荷”特征,导致河流水质下降,生态环境恶化,给沿河和下游城区环境、居民生活以及可持续发展都带来了很大的影响。本文选择深圳市坪山河流域（面积为129.4km2）为典型研究对象,对城市河流水质变化规律及面源污染规律进行研究,可以为治理水环境问题提供强有力的数据支持。经过研究分析,得出以下结论:（1）选取坪山河碧岭、红花潭和上洋三个断面,采用主成分分析方法对坪山河河流水质的24个常规污染指标进行时空变化规律分析,得到20112015年坪山河碧岭水质最佳,红花潭和上洋断面水质长期处于劣Ⅴ类水,并有一定的季节性变化,在空间上,三个断面污染物有一定的差别,但NH4+-N是共有的污染物,在时间上,砷、氨氮一直都是主要的污染物,粪大肠菌群也是比较常见的污染成分,总体看来坪山河河流水质有所改善。（2）采用文献调研和现场勘查相结合的方式系统分析总结了我国城市面源污染的来源及特征、影响因素,分析总结了国内外城市面源污染物浓度特征值,开展了暴雨期间坪山河流域面源污染现场取样调研,为坪山河面源污染模拟提供了参数条件。（3）基于实地勘察与实验研究,将整个坪山河流域划分为145个子汇水区,根据污水管网规划图对主要排水管网的结构进行概化,排水管网拓扑结构点共计766个,管渠757条,通过参数的识别、率定以及校验,构建了模拟效果较好的坪山河SWMM水质模型。（4）利用模型模拟了不同降雨强度坪山河流域COD、NH4+-N和TP这3种污染物的污染状况,结论表明:相同雨型条件下,降雨强度越大,冲刷强度越大,污染物浓度值相应加大,但是幅度变低。一场降水初始阶段的污染物浓度值增加速率逐渐变缓,在达到顶峰之前突然变大,最大值之后,速度以逐渐变缓的加速度减小。污染物浓度的最大值出现在一场降水发生的一小时左右,但是不同场次的降雨耗时不尽相同,降水的强度变大时,污染物浓度达到最大值的时间也会相应提前。（5）利用模型模拟了不同城市化程度降雨情境下坪山河流域COD、NH4+-N和TP这3种污染物的污染状况,结论表明:在相同的降雨情境下,各污染物浓度在城市开发前、现在和开发后这3种城市化程度下变化趋势大致相同,但3种情景下污染物浓度不同,开发前<现在<开发后,随着城市化程度的增大,污染物浓度达到的峰值不断增大。城市化程度较大者污染物浓度达到峰值的时间略早于城市化程度较小者。由此可知,相同降雨条件下,随着城市化程度的提高,地表硬化面积的增加,径流系数增大,污染物冲刷力度增强,污染物浓度大幅度增加。
Abstract
wo guo na fang yu yuan xing cheng shi he liu ,yuan duan liu ji ,shui huan jing rong liang xiao ,zai ou yu jing ji he she hui gao su fa zhan de bei jing xia ,wang wang dan fu le guo chong de wu ran fu he ,cheng xian chu ming xian de “wei rong liang 、chong fu he ”te zheng ,dao zhi he liu shui zhi xia jiang ,sheng tai huan jing e hua ,gei yan he he xia you cheng ou huan jing 、ju min sheng huo yi ji ke chi xu fa zhan dou dai lai le hen da de ying xiang 。ben wen shua ze shen zhen shi ping shan he liu yu （mian ji wei 129.4km2）wei dian xing yan jiu dui xiang ,dui cheng shi he liu shui zhi bian hua gui lv ji mian yuan wu ran gui lv jin hang yan jiu ,ke yi wei zhi li shui huan jing wen ti di gong jiang you li de shu ju zhi chi 。jing guo yan jiu fen xi ,de chu yi xia jie lun :（1）shua qu ping shan he bi ling 、gong hua tan he shang xiang san ge duan mian ,cai yong zhu cheng fen fen xi fang fa dui ping shan he he liu shui zhi de 24ge chang gui wu ran zhi biao jin hang shi kong bian hua gui lv fen xi ,de dao 20112015nian ping shan he bi ling shui zhi zui jia ,gong hua tan he shang xiang duan mian shui zhi chang ji chu yu lie Ⅴlei shui ,bing you yi ding de ji jie xing bian hua ,zai kong jian shang ,san ge duan mian wu ran wu you yi ding de cha bie ,dan NH4+-Nshi gong you de wu ran wu ,zai shi jian shang ,shen 、an dan yi zhi dou shi zhu yao de wu ran wu ,fen da chang jun qun ye shi bi jiao chang jian de wu ran cheng fen ,zong ti kan lai ping shan he he liu shui zhi you suo gai shan 。（2）cai yong wen suo diao yan he xian chang kan cha xiang jie ge de fang shi ji tong fen xi zong jie le wo guo cheng shi mian yuan wu ran de lai yuan ji te zheng 、ying xiang yin su ,fen xi zong jie le guo nei wai cheng shi mian yuan wu ran wu nong du te zheng zhi ,kai zhan le bao yu ji jian ping shan he liu yu mian yuan wu ran xian chang qu yang diao yan ,wei ping shan he mian yuan wu ran mo ni di gong le can shu tiao jian 。（3）ji yu shi de kan cha yu shi yan yan jiu ,jiang zheng ge ping shan he liu yu hua fen wei 145ge zi hui shui ou ,gen ju wu shui guan wang gui hua tu dui zhu yao pai shui guan wang de jie gou jin hang gai hua ,pai shui guan wang ta pu jie gou dian gong ji 766ge ,guan qu 757tiao ,tong guo can shu de shi bie 、lv ding yi ji jiao yan ,gou jian le mo ni xiao guo jiao hao de ping shan he SWMMshui zhi mo xing 。（4）li yong mo xing mo ni le bu tong jiang yu jiang du ping shan he liu yu COD、NH4+-Nhe TPzhe 3chong wu ran wu de wu ran zhuang kuang ,jie lun biao ming :xiang tong yu xing tiao jian xia ,jiang yu jiang du yue da ,chong shua jiang du yue da ,wu ran wu nong du zhi xiang ying jia da ,dan shi fu du bian di 。yi chang jiang shui chu shi jie duan de wu ran wu nong du zhi zeng jia su lv zhu jian bian huan ,zai da dao ding feng zhi qian tu ran bian da ,zui da zhi zhi hou ,su du yi zhu jian bian huan de jia su du jian xiao 。wu ran wu nong du de zui da zhi chu xian zai yi chang jiang shui fa sheng de yi xiao shi zuo you ,dan shi bu tong chang ci de jiang yu hao shi bu jin xiang tong ,jiang shui de jiang du bian da shi ,wu ran wu nong du da dao zui da zhi de shi jian ye hui xiang ying di qian 。（5）li yong mo xing mo ni le bu tong cheng shi hua cheng du jiang yu qing jing xia ping shan he liu yu COD、NH4+-Nhe TPzhe 3chong wu ran wu de wu ran zhuang kuang ,jie lun biao ming :zai xiang tong de jiang yu qing jing xia ,ge wu ran wu nong du zai cheng shi kai fa qian 、xian zai he kai fa hou zhe 3chong cheng shi hua cheng du xia bian hua qu shi da zhi xiang tong ,dan 3chong qing jing xia wu ran wu nong du bu tong ,kai fa qian <xian zai <kai fa hou ,sui zhao cheng shi hua cheng du de zeng da ,wu ran wu nong du da dao de feng zhi bu duan zeng da 。cheng shi hua cheng du jiao da zhe wu ran wu nong du da dao feng zhi de shi jian lve zao yu cheng shi hua cheng du jiao xiao zhe 。you ci ke zhi ,xiang tong jiang yu tiao jian xia ,sui zhao cheng shi hua cheng du de di gao ,de biao ying hua mian ji de zeng jia ,jing liu ji shu zeng da ,wu ran wu chong shua li du zeng jiang ,wu ran wu nong du da fu du zeng jia 。
论文参考文献
论文详细介绍
论文作者分别是来自华北水利水电大学的吴燕霞，发表于刊物华北水利水电大学2019-10-22论文，是一篇关于坪山河论文,城市面源污染论文,水质论文,主成分分析论文,模型论文,华北水利水电大学2019-10-22论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自华北水利水电大学2019-10-22论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：坪山河论文; 城市面源污染论文; 水质论文; 主成分分析论文; 模型论文; 华北水利水电大学2019-10-22论文;