Assessment of Cropland Changes Due to New Canals in Vientiane Prefecture of Laos using Earth Observation Data

Gumma, M K and Takashi, Y and Panjala, P and Deevi, K C and Inthavong, V and Bellam, P K and Mohammed, I (2022) Assessment of Cropland Changes Due to New Canals in Vientiane Prefecture of Laos using Earth Observation Data. Smart Agricultural Technology, 4. 01-11. ISSN 2772-3755

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Abstract

The lower catchment area of a Mak Hiao river system is vulnerable to flash floods and water stress. So it is important to construct irrigation structures in this area to minimize floods during the rainy season and store water for the winter season. The Asian Development Bank (ADB) has been supporting the Government of Laos in constructing such small reservoirs like Donkhuay schemes 1 & 2, Mak Hiao, Nalong 3 and Sang Houabor projects in lower catchment areas. Our study evaluated the impacts of small irrigation schemes in terms of land-use/landcover (LULC), crop intensity, and productivity changes, using high resolution satellite imagery, socioeconomic, and ground data. We analyzed the temporal cropping pattern in the Vientiane prefecture of Laos using Planet and Sentinel-2 data. On the other hand, crop intensity and cropland changes were mapped using Sentinel-2 data and spectral matching techniques (SMTs). The crop classification accuracy based on field-plot data was 88.6%. Our results show that irrigation projects in the lower catchment areas brought about significant on-site changes in terms of cropland expansion and increased crop intensity. Remarkable changes in LULC were observed especially in the command areas owing to an increase of about 300% in crop area with access to irrigation and increase of water bodies by 31%. Our study found that interventions at the level of the command area do improved on-site soil, water and environmental services. They study emphasized underline the role of land-use regulations in reducing pressure on natural land-use systems and thereby serving the major goal of up-scaling sustainable natural resource management. The study documented the vital role of small/medium irrigation projects in restoring ecosystem services such as cropping patterns and LULC conversion

Item Type:	Article
Divisions:	Research Program : Innovation Systems for the Drylands (ISD)
CRP:	UNSPECIFIED
Uncontrolled Keywords:	Irrigation project, LULC conversion, Planet data, Sentinel-2, Google Earth Engine
Subjects:	Others > GIS Techniques/Remote Sensing Others > Irrigation
Depositing User:	Mr Nagaraju T
Date Deposited:	19 Jul 2023 11:02
Last Modified:	19 Jul 2023 11:02
URI:	http://oar.icrisat.org/id/eprint/12135
Official URL:	https://www.sciencedirect.com/science/article/pii/...
Projects:	UNSPECIFIED
Funders:	UNSPECIFIED
Acknowledgement:	This research was supported by the Japan Fund for Poverty Reduction of the Asian Development Bank. The authors would like to thank Dr. Sreenath Dixit and Ms. Noriko Sato for their suggestions and comments on the manuscript.
Links:	Google Scholar

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