Groundwater-Extracting Rice Production in the Rejoso Watershed (Indonesia) Reducing Urban Water Availability: Characterisation and Intervention Priorities

Ni’matul Khasanah, Lisa Tanika, Lalu Deden Yuda Pratama, Beria Leimona, Endro Prasetiyo, Fitri Marulani, Adis Hendriatna, Mukhammad Thoha Zulkarnain, Alix Toulier and Meine van Noordwijk
Additional contact information
Ni’matul Khasanah: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Lisa Tanika: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Lalu Deden Yuda Pratama: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Beria Leimona: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Endro Prasetiyo: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Fitri Marulani: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Adis Hendriatna: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Mukhammad Thoha Zulkarnain: World Agroforestry (ICRAF), Bogor 16001, Indonesia
Alix Toulier: Institut de physique du globe de Paris, Université de Paris, CNRS, 75005 Paris, France
Meine van Noordwijk: World Agroforestry (ICRAF), Bogor 16001, Indonesia

Land, 2021, vol. 10, issue 6, 1-26

Abstract: Production landscapes depend on, but also affect, ecosystem services. In the Rejoso watershed (East Java, Indonesia), uncontrolled groundwater use for paddies reduces flow of lowland pressure-driven artesian springs that supply drinking water to urban stakeholders. Analysis of the water balance suggested that the decline by about 30% in spring discharge in the past decades is attributed for 47 and 53%, respectively, to upland degradation and lowland groundwater abstraction. Consequently, current spring restoration efforts support upland agroforestry development while aiming to reduce lowland groundwater wasting. To clarify spatial and social targeting of lowland interventions five clusters (replicable patterns) of lowland paddy farming were distinguished from spatial data on, among other factors, reliance on river versus artesian wells delivering groundwater, use of crop rotation, rice yield, fertiliser rates and intensity of rodent control. A survey of farming households (461 respondents), complemented and verified through in-depth interviews and group discussions, identified opportunities for interventions and associated risks. Changes in artesian well design, allowing outflow control, can support water-saving, sustainable paddy cultivation methods. With rodents as a major yield-reducing factor, solutions likely depend on more synchronized planting calendars and thus on collective action for effectiveness at scale. Interventions based on this design are currently tested.

Keywords: artesian wells; ecosystem services; landscape approach; Oryza; paddy cultivation; restoration; rodents; sustainable intensification; water balance; Mount Bromo-Tengger (search for similar items in EconPapers)
JEL-codes: Q15 Q2 Q24 Q28 Q5 R14 R52 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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