Eco-hydrological Regime of Source Area of Dongjiang River Based on IHA-RVA

Zeng Jinfeng; Liu Zuwen; Liu Youcun; Zou Jieping; Tong Xingqing; Liu Xinggen; Xie Shuishi

doi:10.13961/j.cnki.stbctb.2021.06.022

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Eco-hydrological Regime of Source Area of Dongjiang River Based on IHA-RVA

- Eco-hydrological Regime of Source Area of Dongjiang River Based on IHA-RVA
- Bulletin of Soiland Water Conservation Vol. 41, Issue 6, Pages: 157-164(2021)
- 作者机构：
  
  1. 江西理工大学土木与测绘工程学院,江西,赣州,341000
  2. 江西省赣江上游水文水资源监测中心,江西,赣州,341000
  3. 嘉应学院地理科学与旅游学院,广东,梅州,514015
  4. 江西理工大学资源与环境工程学院,江西,赣州,341000
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2021.06.022
  CLC： X824
- Published：2021
- 稿件说明：
移动端阅览
Zeng Jinfeng, Liu Zuwen, Liu Youcun, et al. Eco-hydrological Regime of Source Area of Dongjiang River Based on IHA-RVA[J]. Bulletin of Soiland Water Conservation, 2021, 41(6): 157-164.
DOI：

Zeng Jinfeng, Liu Zuwen, Liu Youcun, et al. Eco-hydrological Regime of Source Area of Dongjiang River Based on IHA-RVA[J]. Bulletin of Soiland Water Conservation, 2021, 41(6): 157-164. DOI： 10.13961/j.cnki.stbctb.2021.06.022.

摘要

[目的] 研究东江源区流域生态水文情势的变化，为明确流域生态修复目标和开展生态修复措施提供参考依据，为水利部水环境水生态监测试点工作顺利开展提供经验。[方法] 选取江西省寻乌县的寻乌水背水文站和定南县的定南胜前水文站两个国家站1980—2020年的逐日流量数据，运用生态水文指标变化范围法（IHA-RVA）以及水文改变度法综合评价流域的水文情势改变程度。[结果] ①东江源区整体水文改变度为50.1%，属中度改变，其中寻乌水影响大于定南水； ②32个水文改变指标中，高低流量的频率及延时受影响最小，改变度为26.3%，属低改变； ③流量变化率及概率最大61.5%，属中度改变，特别是最大1 d流量、变换次数、1月均值流量、5月均值流量等指标发生严重变异； ④以鱼类资源变化响应分析验证，源区鱼类资源减少。[结论] 水库运行对东江源区周边生态系统影响较大，亟需适时调控河流的流量，使区域经济与生态环境保护协调发展。

Abstract

[Objective] The changes of eco-hydrological regime in the source region of Dongjiang River basin were studied

in order to provide a basis for clarifying the objectives of eco-restoration and carrying out eco-restoration measures

and to provide experience for the smooth development of the pilot work of water environment and water ecology monitoring of the Ministry of Water Resources.[Methods] The daily flow data of Xunwu shuibei hydrological station in Xunwu County of Jiangxi Province and Dingnan Shengqian hydrological station in Dingnan County from 1980 to 2020 were selected

to comprehensively evaluate the degree of hydrological change of the basin by using IHA-RVA (indicators of hydrologic alteration

IHA; range of variability approach

RVA) method and hydrologic change degree method.[Results] ① The hydrological change degree of the source region of Dongjiang River was 50.1%

which belonged to moderate change

in which the effect of Xunwu Water was greater than Dingnan Water. ② Among the 32 IHA hydrological indexes

the frequency and delay of high and low flow were the least affected

and the degree of change was 26.3%. ③ The maximum flow change rate was 61.5%

which belonged to moderate change

especially the maximum 1-day flow

transformation times

the mean flow in January

the mean flow in May and other indicators have serious variation. ④ According to the analysis of fish resources change

the fish resources in the source region decreased.[Conclusion] The operation of the reservoir has a great impact on the surrounding ecosystem of the source region of the Dongjiang River

and it is urgent to regulate the flow of the river to coordinate the development of regional economy and ecological environment protection.

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