Planning and Strategies for Expansion of Irrigation Services in Mountainous Areas: A Case Study of Nantou County in Taiwan
Year: 2025
Type: conference-paper
Abstract: More than half of the cultivated land belongs to the Irrigation Association. Therefore, there have been no farmland consolidation, irrigation, and drainage projects. The cultivation in the non-irrigation area suffers from poor geographical conditions and a lack of water sources. A practical planning strategy is required for expanding irrigation services. The mountainous area of Nantou County, Taiwan, has 7477 ha of available land and 4656 ha of agricultural land outside the irrigation area. Rain and streams are the main water source. There are 82 ponds, 80% of which belong to the loam soil, and the rainfall from October to February is limited. The water requirement of crops is 1.5–3.1 mm/day. Wild streams, groundwater, and rainwater are the only potential water sources due to elevation and terrain. The potential runoff is estimated to be 0–0.927 cms (m3/s) when using the SCS-CN method. Water supply and demand from October to April are limited, and the rainfall comprises 22% of the total water supply. Large reservoirs and water storage towers are required for flooding and in dry seasons. To address water storage challenges and stabilize the balance between water supply and demand, it is essential to construct additional ponds.
Authors: Feng-Wen Chen, Yun-Wei Tan, Hsiu-Te Lin, Yu-Chien Cho, Ya-Ting Chang, Li-Chi Chiang
Institutions: Tamkang University, National Taiwan University
Language: English
Subfield: Soil Science
Domain: Life Sciences
Open Access status: gold
OpenAlex ID: W4410236182