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Original Article

Dataset of Long-term Monitoring on the Change in Hydrology, Channel Morphology, Landscape and Vegetation Along the Naeseong Stream (I)

내성천의 수문, 하도 형태, 경관 및 식생 특성에 관한 장기모니터링 자료 (I)

Chanjoo Lee1*
,
Dong Gu Kim2
,
Un Ji1
,
Jisung Kim1
이 찬주1*
,
김 동구2
,
지 운1
,
김 지성1
1Senior Researcher, Department of Land, Water and Environment Research, Korea Institute of Construction Technology, Goyang 10223, Korea
2Research Specialist, Department of Land, Water and Environment Research, Korea Institute of Construction Technology, Goyang 10223, Korea
1한국건설기술연구원 국토보전연구본부 수석연구원
2한국건설기술연구원 국토보전연구본부 전임연구원
* Corresponding Author
31 March 2019. pp. 23-33
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Abstract

Naeseong Stream is a sand-bed river that flows through the northern area of Gyeongbuk province. It is characterized by dynamic sandy bedforms developed in response to the seasonal hydrological fluctuation and by its unique riverine landscape called “white river.” However, changes including construction of Yeongju Dam from 2010 and the extensive vegetation establishment around 2015 occurred along the Naeseong Stream. This paper aims to analyze climate, hydrology, and water quality as factors and to examine the possibility of channel changes accordingly. The second least precipitation during the last 60 years happened in 2015, which led to the lowest peak discharge in 50 years. The sediment characteristics of Naeseong Stream were not significantly different along the upstream and downstream reaches, but it was confirmed that annual minimum water level of the stream decreased continuously regardless of the dam construction. This suggests that intermittent drought and change in water quality are likely to provide favorable conditions for riparian vegetation establishment and the resulting physical changes have affected riverbed degradation. Therefore, it is necessary to conduct diversified monitoring in connection with river vegetation change in order to analyze the causes of river changes.

Keywords
Hydrology
Long-term monitoring
Naeseong Stream
Rainfall
Water quality

내성천은 경북 북부지역을 흐르는 모래하천으로 계절적 변동이 큰 수문학적 특성에 반응하여 발달하는 모래 하상의 역동성과 이른바 ‘화이트 리버’라고 하는 경관상 고유성으로 대표되는 하천이다. 하지만 2010년부터 영주댐이 건설되기 시작하고 2015년 전후로 식생이 광범위하게 활착하는 등 하천 변화가 발생하였다. 본 논문의 목적은 하천 변화의 원인이 될 수 있는 기후, 수문, 수질의 변화를 분석하고, 이에 따른 하천 변화의 가능성을 검토하기 위함이다. 분석 결과, 2015년에 1982년 다음으로 적은 강우량이 발생하였으며 이로 인해 여름철 첨두유량은 50년래 최저를 기록하였다. 내성천의 유사량 특성은 상하류가 크게 다르지 않았으나, 댐 건설과 무관하게 내성천의 연 최저수위가 지속적으로 감소하고 있었음을 확인하였다. 이는 간헐적 가뭄과 수질의 변화가 하천 식생의 활착에 유리하게 작용하고, 이에 따른 물리적 변화가 하도 및 식생 활착에 영향을 준 것으로 추정된다. 그러므로 하천 변화의 원인 분석을 위해서는 하천 식생 변화와 연계한 다각적인 모니터링이 필요함을 확인하였다.

키워드
수문
장기 모니터링
내성천
강우량
수질
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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 : 6
  • No :1
  • Pages :23-33
  • Received Date : 2019-03-12
  • Revised Date : 2019-03-21
  • Accepted Date : 2019-03-21
  • DOI :https://doi.org/10.17820/eri.2019.6.1.023
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