[논문]InVEST 모형을 이용한 도시 생태계의 홍수 조절서비스 평가

이태호; 천금성; 권혁수

doi:10.13087/kosert.2022.25.6.51

[국내논문] InVEST 모형을 이용한 도시 생태계의 홍수 조절서비스 평가
Evaluation of Flood Regulation Service of Urban Ecosystem Using InVEST mode 원문보기

環境復元綠化 = Journal of the Korean Society of Environmental Restoration Technology, v.25 no.6, 2022년, pp.51 - 64

이태호 (국립생태원) , 천금성 (국립생태원) , 권혁수 (국립생태원)

Abstract ▼ AI-Helper

Along with the urbanization, the risk of urban flooding due to climate change is increasing. Flood regulation, one of the ecosystem services, is implemented in the different level of function of flood risk mitigation by the type of ecosystem such as forests, arable land, wetlands etc. Land use changes due to development pressures have become an important factor in increasing the vulnerability by flash flood. This study has conducted evaluating the urban flood regulation service using InVEST UFRM(Urban Flood Risk Model). As a result of the simulation, the potential water retention by ecosystem type in the event of a flash flood according to RCP 4.5(10 year frequency) scenario was 1,569,611 tons in urbanized/dried areas, 907,706 tons in agricultural areas, 1,496,105 tons in forested areas, 831,705 tons in grasslands, 1,021,742 tons in wetlands, and 206,709 tons in bare areas, the water bodies was estimated to be 38,087 tons. In the case of more severe 100-year rainfall, 1,808,376 tons in urbanized/dried areas, 1,172,505 tons in agricultural areas, 2,076,019 tons in forests, 1,021,742 tons in grasslands, 47,603 tons in wetlands, 238,363 tons in bare lands, and 52,985 tons in water bodies. The potential economic damage from flood runoff(100 years frequency) is 122,512,524 thousand won in residential areas, 512,382,410 thousand won in commercial areas, 50,414,646 thousand won in industrial areas, 2,927,508 thousand won in Infrastructure(road), 8,907 thousand won in agriculture, Total of assuming a runoff of 50 mm(100 year frequency) was estimated at 688,245,997 thousand won. In a conclusion. these results provided an overview of ecosystem functions and services in terms of flood control, and indirectly demonstrated the possibility of using the model as a tool for policy decision-making. Nevertheless, in future research, related issues such as application of models according to various spatial scales, verification of difference in result values due to differences in spatial resolution, improvement of CN(Curved Number) suitable for the research site conditions based on actual data, and development of flood damage factors suitable for domestic condition for the calculation of economic loss.

주제어

표/그림 (9)

그림 Figure 1. The procedure for assessing regulation services of urban flood risk mitigation
그림 Figure 2. Area of interest
표 Table 2. Curve Numbers according to Land cover and Soil type(NRCA-USDA guidelines, 2007; Carlotta. et al., 2021)
표 Table 3. Damage factor according to the Depth of rainfall(JRC, 2017)
그림 Figure 3. Map of runoff retention(㎥/pixel) using UFRM
표 Table 4. Input data and format of InVEST Urban Flood Risk Mitigation model
표 Table 5. Runoff retention results by ecosystem(land cover classification)
그림 Figure 4. Map of runoff exceeding 50mm(10 year frequency)
그림 Figure 5. Map of runoff exceeding 50mm(100 year frequency)

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