A LiDAR-based flood modelling approach for mapping rice cultivation areas in Apalit, Pampanga
Date
2017-03
Authors
Toda, Luigi L.
Yokingco, John Colin E.
Paringit, Enrico C.
Lasco, Rodel D.
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Abstract
Majority of rice cultivation areas in the Philippines are susceptible to excessive flooding owing to intense
rainfall events. The study introduces the use of fine scale flood inundation modelling to map cultivation
areas in Apalit, a rice-producing municipality located in the province of Pampanga in the Philippines. The
study used a LiDAR-based digital elevation model (DEM), river discharge and rainfall data to generate
flood inundation maps using LISFLOOD-FP. By applying spatial analysis, rice cultivation zone maps were
derived and four cultivation zones are proposed. In areas where both depth and duration exceed
threshold values set in this study, varieties tolerant to stagnant flooding and submergence are highly
recommended in Zone 1, where flood conditions are least favorable for any existing traditional lowland
irrigation varieties. The study emphasizes that a decline in yield is likely as increasing flood extents and
longer submergence periods may cause cultivation areas for traditional irrigated lowland varieties to
decrease over time. This decrease in yield may be prevented by using varieties most suitable to the
flooding conditions as prescribed in the rice zone classification. The method introduced in this study
could facilitate appropriate rice cultivation in flood-prone areas.
Description
Keywords
Flood modelling, LiDAR, GIS, Rice cultivation areas
Citation
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Source
Applied Geography
Type
Journal article
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Access Statement
Open Access
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