中国科学院生态环境研究中心机构知识库
Advanced  
RCEES OpenIR  > 环境水质学国家重点实验室  > 学位论文
题名: 苕溪上游临安段河流生态系统健康的初步研究
作者: 叶磊
学位类别: 硕士
答辩日期: 2010
授予单位: 中国科学院研究生院
授予地点: 北京
导师: 尹澄清 ; 祝贵兵
关键词: 河流健康 ; 评价方法 ; 水质-生物-沉积物 ; 上游河段
中文摘要:       “河流健康”是河流生态环境保护的终极目标。上游河段是河流生态系统的源头部分,它的保护和恢复对干流健康非常重要。本研究选择位于浙江省丘陵山区的苕溪上游临安段进行河流健康研究,这无论是对其所在的浙江省临安市环境保护和生态市建设,还是用于整个苕溪的河流健康评估,都具有十分重要的意义。 本文通过资料收集、实地勘察、采样鉴定和分析监测,从水质、生物组成和沉积物微生物等方面进行研究,借鉴国际上较成熟的河流健康评价方法,对该河段的河流健康状况进行了评价。 苕溪临安段属山溪性河流。苕溪临安段所处的流域属于亚热带季风气候区,气候温和,雨量丰沛,雨热同期。苕溪临安段水质较好。锦溪是苕溪临安段流域的主要污染河流,污染类型为氮污染。 苕溪临安段生物多样性较高,共发现底栖动物达188种,隶属于4门60科135属,毛翅目和双翅目昆虫为主要底栖动物种类;着生藻类共获得5门58属160种,硅藻是优势种属。各个采样点的底栖动物种类数与水质呈现一定的正相关关系,底栖动物生物量与水质呈现一定的负相关关系。各个采样点的着生藻类种类数与水质未发现明显的相关关系,着生藻类生物量与水质呈现一定的负相关关系。 各采样点根际沉积物的氨氧化古菌表现出了明显的丰度分布差异,而氨氧化细菌则变化不大。5个采样点的氨氧化古菌amoA基因序列划分出了26个OTU,分布在土、水两相分支之中,以土壤/沉积物相为主。春季的氨氧化古菌丰度明显高于夏季,水生植物根际沉积物的氨氧化微生物丰度高于非根际的沙粒沉积物。 综合考虑河流水文、形态、河岸带状况、水质及水生生物等表征元素,建立了适合苕溪上游段的河流健康评价标准,将河流划分为非常健康、一般健康、普通、一般病态和严重病态等五个健康等级。河流健康评价结果显示,2010年4月23日9个采样点的河流健康状况范围在一般健康与一般病态之间,不存在特别健康和严重病态的河段。河流健康的评估以本河段的历史状态作为参照,可以比较容易地反映出河流管理和保护工作的问题和成效,也可以克服不同河流之间的可比性问题。 河流环境的破坏是一个长期的过程,河流健康的恢复也需要付出一个长期的努力。河流健康的恢复需要针对不同河流的特点而采取有针对性的采取措施。河流健康问题的解决不应局限于河流内部,还应该包括流域管理和污染控制,从源头解决影响河流健康的问题。
英文摘要:
      “River Health” is the final work target of environmental protection on river ecosystem. Upstream is the source reach of a river, and upstream protection and recovery is very important to main reach of the river. A river health case study was conducted in the upstream of Tiaoxi River, in the hilly region of Zhejiang Province. This research has a great significance both on the eco-city construction of Lin’an City, and on river health assessment of the whole Tiaoxi River. The water chemistry, biology composition and sediment microorganism in river were investigated. Methods such as historical data collection, field survey, sampling on sites and analysis in the laboratory were conducted. Then, river health condition of Tiaoxi Lin’an stream was assessed by referring to the river health assessment methods developed by international researchers. Lin’an reach of Tiaoxi River is a typical highland stream. Its catchment belongs to subtropical monsoon climate zone, which is characteristic with mild climate, and abundant rainfall fallen with high temperature in summer. Water quality of Tiaoxi Stream is generally in a good condition and Jinxi River is polluted nitrogen is the major pollutant. Biodiversity of Tiaoxi Lin’an Stream showed a good statement. Invertebrates were found with a category number of 188, with trichoptera and diptera as the dominant species; benthic algaes were found with a category number of 160, with diatoms as the dominant species. Category numbers of invertebrates on sample sites were found to have positive relations with water quality, while the biomasses were found to have negative relations with water quality. Category numbers of benthic algaes on sample sites had not been found to have relations with water quality, but the biomasses were found to have negative relations with water quality. Ammonia-oxidizing archaea (AOA) was found greater differences in different sample sites than ammonia-oxidizing bacteria (AOB). All the amoA genes are divided into 26 OTUs, and located in both water column and soil column of Phylogenetic tree. amoA genes in soil column are the basic type. It was found that abundance of AOA in spring were high than that in summer and abundance of ammonia-oxidizing microbes in vegetated sediments were high than that in unvegetated areas. Based on informations of hydrology, fluvial geomorphology, riparian areas, water quality and biological communities, a river health assessment method was developed for Tiaoxi Lin’an Stream. The health condition of the river was divided into five degrees, including very healthy, fair healthy, middle healthy, less healthy and poor. Results of river health assessment on Apirl 23ed, 2010 showed that the condition of 9 sample sites distributed from fair healthy to less healthy, health condition of very healthy and poor did not exist in Tiaoxi Lin’an Streams. Assessment of river health should consider historical conditons as reference. By that way, the manangers can see the changes of river ecosystem, evaluate the restoration efforts and compare different rivers. Both environmental degradation and restoration are the long-term processes, are different for different rivers. The work should not only be in the river bed itself, but also in the catchment management and pollution control. River health should be mentioned from sources.
内容类型: 学位论文
URI标识: http://ir.rcees.ac.cn/handle/311016/35068
Appears in Collections:环境水质学国家重点实验室_学位论文

Files in This Item:
File Name/ File Size Content Type Version Access License
苕溪上游临安段河流生态系统健康的初步研究.pdf(2734KB)学位论文--限制开放 联系获取全文

Recommended Citation:
叶磊. 苕溪上游临安段河流生态系统健康的初步研究[D]. 北京. 中国科学院研究生院. 2010.
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[叶磊]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[叶磊]‘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