The method of period division and range setting for annual river discharge management

Tae Sun Park

doi:10.3741/JKWRA.2023.56.1.1

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2023 Vol.56, Issue 1 Next Page

Research Article

The method of period division and range setting for annual river discharge management 연중 하천유량 관리를 위한 기간 구분 및 관리범위 설정 방안

31 January 2023. pp. 1-9

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Abstract

Until now, the periods of river discharge management throughout a year are divided into flood and non-flood periods, and the ranges of discharges to be managed are broadly defined from drought discharge to flood discharge. In this study, using the long-term daily discharge data from 8 points of four major rivers, we propose a method of dividing the year into several periods with the homogeneous mean and dispersion of discharges. As a result of the study, the period of through a year was different depending on the point, but it could be divided into pre-flood period, flood period, and post-flood period. And the more subdivided the period, the more decreased the ratio of the maximum discharge to the minimum discharge. In addition, in order to ensure that the discharge for a year is more than the drought discharge and less than the flood discharge, to set the range of discharge management per period as the average flow ± standard deviation for each period is proposed.

Keywords

River discharge management

Period division

Range of discharges to be managed

CUSUM

현재까지는 연중 하천유량의 관리기간은 홍수기와 비홍수기로 구분하고, 관리해야 할 유량의 범위는 갈수량에서 홍수량까지로 폭넓게 규정하고 있다. 본 연구에서는 4대강 8개 지점의 장기간 일평균유량 자료를 이용하여1년을 유량의 분산과 평균이 동질한 기간들로 구분하고, 기간별 유량의 평균과 표준편차를 이용하여 유량의 관리범위를 설정하는 방안을 제시한다. 연구결과, 연중 관리기간은 지점에 따라 차이는 있으나 홍수기 이전, 홍수기, 홍수기 이후로 구분할 수 있었으며, 기간을 세분화하면 최소유량에 대한 최대유량의 비도 낮아지는 것을 알 수 있었다. 또한, 연중 일평균유량이 갈수량 이상 홍수량 이하가 되도록 기간별 일평균유량의 관리범위를 기간별 일평균유량의 평균 ±표준편차로 설정하는 방안도 제시하였다.

키워드

하천유량 관리

관리기간의 구분

유량의 관리범위

누적합법

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Information

Publisher :KOREA WATER RESOURECES ASSOCIATION
Publisher(Ko) :한국수자원학회
Journal Title :Journal of Korea Water Resources Association
Journal Title(Ko) :한국수자원학회 논문집
Volume : 56
No :1
Pages :1-9
Received Date : 2022-08-01
Revised Date : 2022-10-25
Accepted Date : 2022-10-25
DOI :https://doi.org/10.3741/JKWRA.2023.56.1.1

Journal of Korea Water Resources Association ISSN:2799-8746(Print) 2799-8754(Online) 한국수자원학회 논문집

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