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时间:2020-03-25
《基于水功能区划的河流生态环境需水量计算研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、西安理工大学学报JournalofXi’anUniversityofTechnology(2012)Vo1.28No.1文章编号:1006-4710(2012)01-0049-07基于水功能区划的河流生态环境需水量计算研究宋刚福一,。洗冰(1.西安理工大学西北水资源与环境生态教育部重点实验室,陕西西安710048;2.华北水利水电学院环境与市政工程学院,河南郑州450011)摘要:以北运河为例,根据河流功能区划及河流特点,基于分时段、分区域、分等级的思想,综合采用Tennant法、水质模型法、鱼类生境法进行北运河流域生态环境需水量计算,得出北运河各功能区河段的最小、
2、适中、最佳生态需水量。研究结果表明:沙河闸一北关闸、北关闸一杨洼闸的河段水污染严重,仅依靠增加基流量无法满足河流水质功能要求,需要在满足河道一定基流的基础上最大程度削减河段的污染物排放量;土门楼一筐儿港、筐儿港一屈家店河段,采用鱼类生境法计算河道生态环境需水量分别为2.581亿m/a、3.016亿m/a.此水量是该河段恢复河流生态结构与功能健康的最佳需水量。关键词:河流生态环境需水量;计算方法;功能区划中图分类号:X171.1文献标志码:ACalculationResearchonRiverEco.EnvironmentalWaterRequirementsBase
3、donWaterFunctionRe#onalizationSONGGangfuI..SHENBing(1.KeyLabofNorthwestWaterResourcesandEnvironmentEcologyofMOE,Xi’alUniversityofTechnology,Xi’an710048,China;2.InstituteofEnvironmentalandMunicipalEngineeringatNorthChinaUniversityofWaterResourcesandElectricPower,Zhengzhou450011,China)Ab
4、stract:WiththeBeiyunheRiveranexample,intermsofriverfunctionregionalizationandriverchar-acteristicsandbasedontheideasoftimesection,regionalsectionandstagedivision,suchcomprehen-sivemethodsasTennantmethod,waterqualitymodelmethodandfishhabitatmethodareadoptedtocarryoutwaterrequirementcalc
5、ulationofeco—environsintheNorthcanalvaney,wherebyobtainingthemini—mum,moderateandtheoptimaleco—waterrequirementsforeachfunctionalregionriversectionoftheBe-iyunheRiver.ItcanbeknownviacalculationanalysisthatwaterpollutionisseriousintheriversectionsofShaheGate-BeiguanGate,BeiguanGate-Yang
6、waGate.Accordingly,onlybyrelyingonincreasingbaseflow,threeisnowaytosatisfythefunctionalrequirementsofthefiverwaterquality,itisnecessarytoeliminatethepollutantemissiontothemaximumextentintheriversectionbasedonthebaseflowinthefivercourse.Therefore,fishhabitatmethodshouldbeadoptedtocalcul
7、atewaterrequirementsofrivercourseeco—environs,whichare25810O00m。/aand30160000m/aatTuMenlouGate-KuangEr-gangGate,KuangErgangGate—QuJiadianGaterespectively.Thisflowistheoptimalwaterrequirementfortherestorationoffivereco—structureandhealthfunctionofthatriversection.Keywords:fivereco—env
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