Spatial-Temporal Changes in Water Supply and Demand in the Citarum Watershed, West Java, Indonesia Using a Geospatial Approach

Irmadi Nahib (), Fahmi Amhar, Yudi Wahyudin, Wiwin Ambarwulan, Yatin Suwarno, Nawa Suwedi, Turmudi Turmudi, Destika Cahyana, Nunung Puji Nugroho, Fadhlullah Ramadhani, Deddy Romulo Siagian, Jaka Suryanta, Aninda W. Rudiastuti, Yustisi Lumban-Gaol, Vicca Karolinoerita, Farid Rifaie and Munawaroh Munawaroh
Additional contact information
Irmadi Nahib: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Fahmi Amhar: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Yudi Wahyudin: Faculty of Agriculture, Djuanda University, Jl. Tol Ciawi No.1, Ciawi, Bogor 16720, Indonesia
Wiwin Ambarwulan: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Yatin Suwarno: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Nawa Suwedi: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Turmudi Turmudi: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Destika Cahyana: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Nunung Puji Nugroho: Research Center for Ecology and Ethnobiology, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor Km. 46, Cibinong, Bogor 16911, Indonesia
Fadhlullah Ramadhani: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Deddy Romulo Siagian: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Jaka Suryanta: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Aninda W. Rudiastuti: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Yustisi Lumban-Gaol: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Vicca Karolinoerita: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Farid Rifaie: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia
Munawaroh Munawaroh: Research Center for Geospatial, National Research and Innovation Agency of Indonesia (BRIN), Jalan Raya Jakarta-Bogor KM 46 Cibinong, Bogor 16911, Indonesia

Sustainability, 2022, vol. 15, issue 1, 1-28

Abstract: Balancing water supply demand is vital for sustaining livelihoods. Spatial mapping and calculating water yield dynamics due to land use changes over decades are needed to manage land resources and formulate ecological protection policies. This study mapped the supply, demand, and matching status of water product service using the Integrated Valuation of Ecosystem Service and Tradeoff (InVEST) biophysical models in the Citarum Watershed (CW) in 2000, 2010, and 2020. Moreover, this study used Exploratory Spatial Data Analysis (ESDA) and Geographic Information System (GIS) techniques to study the agglomeration characteristics and evolutionary trajectories of supply–demand over two decades. The results showed that between 2000–2010 and 2010–2020, the water supply decreased by 19.01 × 10 8 m 3 (18.28%) and 12.97 × 10 8 m 3 (15.27%), respectively. However, the water demand in the same period increased by 6.17 × 10 8 m 3 (23%) and 15.74 × 10 8 m 3 (47%), respectively. Over the decades, the contribution of land use land cover (LULC) changes to variations in water supply has yielded values ranging from 2.87% to 6.37%. The analysis of the water supply–demand imbalance indicated that the entire CW experienced water shortage, and the type of spatial matching for supply and demand is dominated by a high supply and high demand class (16.09% of the total area). Based on the level of water deficit calculation, the upstream and downstream areas were identified as zones that require ecological conservation, while the middle CW area requires ecological restoration or ecological improvement.

Keywords: water yield; InVEST model; water supply; water demand; LULC change (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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