Stream analysis for a sub-catchment of Red River (Vietnam) using isotopic technique and recursive digital filter method

IF 2.4 3区 环境科学与生态学 Q2 ENGINEERING, CIVIL
Vo Thi Anh , Ha Lan Anh , Mai Dinh Kien , Vu Hoai , Dang Duc Nhan , U. Saravana Kumar
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引用次数: 0

Abstract

River streams, in general, comprise of two flows: quick flow and baseflow. The baseflow is closely related to geological catchment properties, and understanding the baseflow contribution to stream flow is very important in the planning of water resources management. The baseflow in a sub-catchment of the Red River in Vietnam was quantified using the isotopic technique, and results were compared with Eckhardt’s recursive digital filter (RDF) method. Results of the isotopic approach showed that groundwater is recharged from regions at 300 to 800 m above mean sea level. The upstream baseflow gains from Holocene and Pleistocene aquifers throughout the year, contributing to 65 ± 4 % of the river discharge. On the contrary, the midstream baseflow contributes 44.6 ± 6.5 % of the river’s annual discharge to both Holocene and Pleistocene aquifers. The downstream is more complicated, where the baseflow loses to the Pleistocene aquifer and gains 73 ± 17 % of the river's annual discharge from the Holocene aquifer. The loss of baseflow was attributed to the high rate of groundwater mining.

Maintaining the vegetative cover over the recharge areas is recommended to reduce runoff and increase groundwater potential so that the baseflow could sustain the river stream.

用同位素技术和递归数字滤波方法分析越南红河某子集水区的水流
河流一般由两种流组成:急流和基流。基流与流域的地质性质密切相关,了解基流对河流流量的贡献对水资源管理规划具有重要意义。采用同位素技术对越南红河流域的基流进行了定量分析,并与Eckhardt递归数字滤波(RDF)方法进行了比较。同位素方法的结果表明,地下水补给来自平均海平面以上300 ~ 800 m的地区。上游基流全年从全新世和更新世含水层中增加,占河流流量的65±4%。相反,中游基流对全新世和更新世含水层的年流量贡献为44.6%±6.5%。下游情况更为复杂,基流流入更新世含水层,占全新世含水层年流量的73%±17%。基流的损失是由于地下水开采率高。建议在补给区保持植被覆盖,以减少径流和增加地下水潜力,使基流能够维持河流。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Hydro-environment Research
Journal of Hydro-environment Research ENGINEERING, CIVIL-ENVIRONMENTAL SCIENCES
CiteScore
5.80
自引率
0.00%
发文量
34
审稿时长
98 days
期刊介绍: The journal aims to provide an international platform for the dissemination of research and engineering applications related to water and hydraulic problems in the Asia-Pacific region. The journal provides a wide distribution at affordable subscription rate, as well as a rapid reviewing and publication time. The journal particularly encourages papers from young researchers. Papers that require extensive language editing, qualify for editorial assistance with American Journal Experts, a Language Editing Company that Elsevier recommends. Authors submitting to this journal are entitled to a 10% discount.
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