Analysis of Habitat Conditions by Tree Density and Discharge in the Geum River

Mikyoung Choi; Taeun Kang; Changlae Jang

doi:10.17820/eri.2023.10.4.250

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2023 Vol.10, Issue 4 Preview Page Next Page

Original Article

Analysis of Habitat Conditions by Tree Density and Discharge in the Geum River 수목밀도와 유량에 따른 금강의 물리서식처 변화 분석

31 December 2023. pp. 250-257

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Abstract

Tree in river have environmental functions such as ecosystem preservation and flood control functions that protect the riverbank. On the other hand, excessive tree development can have the negative effect of fixing the sand bar and reducing the cross-sectional area. Nays2D simulation results performing two flow conditions (average dam operation discharge and two-year frequency discharge) and four tree density conditions (current, zero, low, high tree density) used as input data for PHABSIM to calculate WUA (Weighted Usable Area). The results show that riverbed changes occur more significantly in the zero tree density than presence of trees, which could have a positive impact on the biological habitat environment of Zacco platypus.

Keywords

2D riverbed simulation

Geum River

Physical habitat simulation

Tree density

Weighted usable area

하천에서의 수목은 생물다양성 증진의 환경적 기능과 하안을 보호하는 치수적 기능을 가지는 반면, 과도한 수목 발달로 인하여 사주가 고정화되고, 통수단면적이 부족해지는 부정적인 영향을 미치기도 한다. 본 연구에서는 실제 하천 현장조사를 통하여 수목밀도를 산정하고, 수목밀도를 반영한 2차원 수치모의 (Nays2D) 결과를 활용하여 유량과 수목밀도에 따른 하상변동이 생물 서식처 변화에 미치는 영향을 PHABSIM모의를 통하여 추정한다. 2가지 유량 조건 (평균 댐운영 방류량과 2년빈도 방류량)과 4가지 수목 밀도 조건 (2021년 수목 밀도, 밀도를 0으로 조정한 전체 벌채, 밀도를 0.5배 감소한 경우, 밀도를 2배 증가하는 경우)을 이용한 8개의 시나리오를 Nays2D모의를 수행하여 도출한 하상변동 결과를 PHABSIM의 입력자료로 활용하여 피라미를 대상으로 시나리오 별 가중가용면적 (WUA)을 산정하였다. 그 결과 수목이 없는 경우에 하상 변동이 더 현저하게 발생하게 되고, 그에 따라 피라미 서식 환경에 긍정적인 영향을 미칠 수 있음을 추정할 수 있었다.

키워드

2차원 하상변동 모의

금강

물리적 서식처 모의

수목밀도

가중가용면적

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Information

Publisher :Korean Society of Ecology and Infrastructure Engineering
Publisher(Ko) :응용생태공학회
Journal Title :Ecology and Resilient Infrastructure
Journal Title(Ko) :응용생태공학회 논문집
Volume : 10
No :4
Pages :250-257
Received Date : 2023-12-05
Revised Date : 2023-12-18
Accepted Date : 2023-12-18
DOI :https://doi.org/10.17820/eri.2023.10.4.250

Ecology and Resilient InfrastructureISSN:2288-8527(Online)응용생태공학회

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