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정량화에 의한 물리적 하천교란 평가기법의 개선과 적용

An Improvement and Applicability of Physical Disturbance Evaluation Technique by Quantification in River System

  • 최흥식 (상지대학교 대학원 토목공학과) ;
  • 심규랑 (상지대학교 대학원 토목공학과) ;
  • 이웅희 (상지대학교 대학원 토목공학과)
  • 투고 : 2015.04.10
  • 심사 : 2015.05.20
  • 발행 : 2015.08.31

초록

본 연구에서는 기존의 물리적 하천교란 평가방법을 개선하고 적용성을 분석하였다. 개선한 교란평가 기법은 정성적 항목을 정량적인 항목으로 제시하고 이의 근거와 평가 산정식을 제시하였고, 이에 상응하는 평가영역 내 점수를 보다 세분화 하고 수리특성과 지형 변화를 수치모의에 의한 결과를 이용할 수 있도록 개선하였다. 개선된 교란평가방법은 적용성을 확인하기 위해 비정비하천, 도시관류하천, 산지계류하천의 특성을 가지는 6개의 하천에 적용하여 기존의 평가방법과 개선된 평가방법의 결과를 비교 분석하였다. 하상서식환경과 하상재료를 제외한 8가지 평가항목은 HEC-RAS 수치모의 결과를 직접 입력하여 간편하게 수행할 수 있었다. 또한 정량적 평가방법의 적용 결과 기존의 평가방법보다 민감한 평가 결과를 나타냈으나, 전반적으로 기존의 평가방법과 비슷한 결과를 나타내어 적용성이 있음을 확인하였다.

This study has improved the existed physical disturbance evaluation assessment technique in a river and analysed its applicability. The improvements are the quantitative evaluation items instead of qualitative one by providing the background and their evaluation equations, corresponding detailed itemization of evaluation score, and the direct input of hydraulic characteristics and geometrical changes by numerical simulation. In order to confirm the applicability of improved disturbance evaluation technique, the comparison and analysis between the evaluation results of existed and improved techniques have been carried out by applying to the 6 cases of natural, urban, and mountainous streams. Direct input of numerical simulation results of HEC-RAS enables the evaluation simple for 8 evaluation items excluding the items of habitat environment and bottom substrate. The improved disturbance evaluation technique, which evaluates the degree of disturbance sensitively by the quantitative and detailed itemized evaluations, has been confirmed the appropriate applicability by applying to river systems.

키워드

참고문헌

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피인용 문헌

  1. Physical Disturbance Improvement Evaluation and Habitat Suitability Analysis by Stable Channel Design vol.3, pp.4, 2016, https://doi.org/10.17820/eri.2016.3.4.285