基于水文学法的生态流量适宜性评价研究
Study on suitability evaluation of ecological flow based on hydrological methods
赵渔亨 1晁立强 2王远坤 3李然 1王远铭1
作者信息
- 1. 四川大学山区河流保护与治理全国重点实验室,四川成都 610065
- 2. 中水北方勘测设计研究有限责任公司,天津 300222
- 3. 华北电力大学水利与水电工程学院,北京 102206
- 折叠
摘要
水资源开发利用改变了河流天然水文情势,影响了河流生态环境,提供适宜的生态流量对保障河流系统健康具有重要意义.考虑径流非一致性及数据冗余,运用M-K检验法、累积距平法、PCA-IHA指标体系等能更准确地判断河流水文情势的改变程度;基于生态流量计算的水文学法,建立了完整的生态流量适宜性评价体系,提出了阈值区间保证率、偏差指数、达标率等3 个评价指标,并综合成适宜性指数这一综合指标,在赣江干流进行应用.结果表明:①赣江干流1960～2015 年的水文情势改变度较低,变异点为1991 年;② 各水文学法在所提出的评价指标中各有优劣,且适宜性指数差异较大,说明该评价体系可以较好地筛选出对研究区域适用的计算方法,其中赣江干流最适宜的为逐月频率法,适宜性指数为0.8.研究成果可为完善生态流量适宜性评价体系提供科学参考.
Abstract
The exploitation and utilization of water resources have changed the natural hydrological regime of rivers and impact-ed the ecological environments of rivers.Ensuring a suitable ecological flow is crucial for the preservation of river ecosystems.Con-sidering the runoff inconsistencies and the data redundancy,we employ the M-K method,Cumulative Offset Verification and the PCA-IHA index system to evaluate the alteration degree of a hydrological regime more accurately.A comprehensive ecological flow suitability evaluation system is established based on the hydrological method of ecological flow calculation.We propose three evaluation indexes such as the threshold interval guarantee rate,deviation index,and standard compliance rate,and then establish a suitability index synthetically.The application of this system to the mainstream of the Ganjiang River revealed that:①The alter-ation degree of the hydrological regime in the Ganjiang River mainstream from 1960 to 2015 was low,with a variation point in 1991.②Each hydrological method has its strengths and weaknesses in the proposed evaluation index,and the suitability index va-ries significantly,which indicates that this evaluation system can effectively filter out the calculation method most suitable for the study area.In the case of the Ganjiang River mainstream,the most suitable method is the monthly frequency method,with a suita-bility index of 0.8.The research results can provide a scientific reference for improving the suitability evaluation system of ecolog-ical flow.
关键词
生态流量/适宜性评价/水文学法/水文情势/赣江Key words
ecological flow/suitability evaluation/hydrological method/hydrological regime/Ganjiang River引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据