Song, Kihwan with Jinhyung Chon and Nam Hee Choi  "Analysis of the Social-Ecological System of the Four Major Rivers Project and Resilience Improvement Plan with a Focus on the Ecosystem Services of the Nakdong River", 2018 August 7 - 2018 August 9

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& THE 36™ INTERNATIONAL CONFERENCE OF THE SYSTEM DYNAMICS SOCIETY

REYKJAVIK, ICELAND

Analysis of the Social-Ecological
System of the Four Major Rivers
Project and Resilience
Improvement Plan with a Focus
on the Ecosystem Services of
Kinthe Nakdeng RINEKity
Jinhyung Chon, Korea University

Nam-Hee Choi, Korea National University of
Transport

0:00-

@® Problem Statement

* Ecosystem services

problem
- Provisioning services:
agriculture/industrial water

- Regulating services: algal
bloom

- Cultural services: ecotourism

- Supporting services:
destruction of ecosystems

* The purpose of this study

- to identify the change of ecosystem service resilience
through analysis of social-ecological system in the Nakdong
River area and to suggest resilience improvement plan

using the resilience principle.
0:30-

Syston N . 1
&S Approach or Dynamic Hypothesis

* Classification of ecosystem services in the Nakdong River area and key variables

Section

Subsection

Contents

Key variable

Provisioni
ng
services

Food

Fish and shellfish

Fishery production

Animals and plants, dietary fiber

Crop and livestock production

Freshwater

Direct use

Water discharge
Quantity of water intake
Water for living, industrial water,
agriculture water

Energy

Hydroelectric power

Biotic and abiotic .
generation

energy sources

Hydroelectric power generation facility
Hydroelectric power generation amount
Amount of use

Biomass energy source

Energy production amount using biomass

Regulatin

services

Climate
regulation

Microclimate regulation

Evapotranspiration per day/month
Water temperature

Water purification

Water purification
function by flow or
velocity

Average storage
Mean velocity of flow
Residence time

Pollutant self-

purification capacity Water purification

capacity

Water purification index animals and
plants

Attached algae species and population
amount

Emerged plant

Disaster
regulation

Flood, drought, forest fire prevention and
mitigation

Flood prevention facility

Flood frequency

Cultural
services

Ecotourism

River ecotourism

Ecotourism destination designation
Participation

Rest/leisure

Hydrophile property act and space utilization

Jogging, bicycle exercise, fishing,
swimming, etc.

Waterfront park utilization

Festival events

Landscape
aesthetics

Visual landscape

Ecological Landscape Protected Area
designation

River geomorphological landscape

Religious

Identity

Cultural properties designation

Sunnortin

Habitat

Ecosystem support through habitat continuity

Watershed or sphere area 5.99

Nattral ecocvctem area —_

& Progress and Insights to Share
———

* Analysis of a causal loop diagram and resilience of ecosystem services in the Nakdong River area
Regulating-_seryice

region water intake

watermelon garlic and orfon region
j Production agricuturt water

1 - 1
visitors: a 43) 1
i

7 ABD watermelpn region +
flooging

ra Rs I cr or Septem cae

rtweeLOvisioning service

+
watermelon region
ground water level)

waterfront park +

* Resilience improvement plan for ecosystem services in the Nakdong River
area 3:30-

Metadata

Resource Type:
Document
Description:
In this study, the ecosystem services in the Nakdong River area resulting from the Four Major Rivers Restoration Project in Korea were analyzed. A plan is proposed to improve the resilience of ecosystem services in the region. First, this study classify ecosystem services in the Nakdong River area by provisioning, regulating, cultural, and supporting service categories and derived related variables for each category. Second, the classification of ecosystem services and the development of a causal loop diagram of the Nakdong River region and an analysis of resilience revealed that a trade-off phenomenon occurred, in which the resilience decreased for each ecosystem service category. Third, this study describes the changes in the system structure needed to manage core elements by analyzing diversity and redundancy, connectivity, slow variables and feedback to solve the problems in each ecosystem service and promote resilience centered on the resilience principle. The results of this study can provide background information for policies to adequately solve the various problems and issues in river development in national units. These findings also provide a basis for the development and restoration of rivers that can improve the resilience of ecosystem services at the national level.
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Date Uploaded:
March 10, 2026

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