Assessing the potential of domestic reclaimed water for agricultural irrigation in Taiwan
Journal
Water Policy
Journal Volume
27
Journal Issue
4
Start Page
501
End Page
520
ISSN
1366-7017
1996-9759
Date Issued
2025-03-06
Author(s)
Abstract
Taiwan experiences significant variability in its water resources, with uneven rainfall distribution leading to challenges in water management, particularly in agriculture. This study investigates the potential of reclaimed water as a supplementary source for agricultural irrigation to address water shortages and improve resource efficiency. The study analyzes data from Taiwan's irrigation management offices and explores two scenarios: the current reclaimed water production capacity and the maximum potential supply. Results indicate that under current conditions, reclaimed water could reduce the overall irrigation water deficit from 28.1 to 20.1%, with a further reduction to 15.4% under maximum capacity. The northern region, in particular, could eliminate its water deficit entirely under both scenarios, while the central and southern regions could see significant improvements. Furthermore, reclaimed water has the potential to irrigate an additional 49,759.7 ha of paddy fields under current capacity, expanding to 82,836.3 ha under maximum capacity. However, the use of reclaimed water must be carefully managed to prevent increased ammonia nitrogen concentrations in rivers, which could lead to water pollution. This study highlights the critical role of reclaimed water in mitigating the impacts of drought and improving water resource sustainability in Taiwan's agricultural sector.
Subjects
Agricultural irrigation
Domestic reclaimed water
Water reuse
Water shortage
Publisher
IWA Publishing
Type
journal article