MANAGEMENT&ECONOMICS

Economic analysis of irrigation facilities for securing water for field crops

Hyung Jin Shin1, Jae Young Lee2, Jae Nam Lee1, Han Na Lee3, Sang Hyeon Park3, Bum Soo Shin3, Sang Sun Cha4, Se Myung Kwon5, Jung Il Seo6, Chan Gi Park3,*

1Rural Research Institute, Korea Rural Community Corporation, Ansan 15634, Korea
2Research Center, Contecheng Co., Ltd., Yongin 16942, Korea
3Department of Rural Construction Engineering, Kongju National University, Yesan 32439, Korea
4Industrial Development Institute, Kongju National University, Yesan 32439, Korea
5Forest Restoration center, Korea Association of Forest Enviro-Conservation Technology, Cheongju 28165, Korea
6Department of Forest Science, Kongju National University, Yesan 32439, Korea

*Corresponding author: cgpark@kongju.ac.kr

Abstract

Considering irrigation facilities are currently insufficient and drought vulnerability due to climate change is high, efficient measures are required to secure water supply for field crops. This study, therefore, calculated the water shortage to secure water for representative field crops. An economic analysis was further conducted by comparing the production income to the input cost for each method. Here, five distinct regions were selected to represent each crop—Cheongyang-gun for chili peppers, Yesan-gun for apples, Dangjin-si for cabbages, Seosan-si for garlic, and Goesan for beans. The regions with insufficient water supply were estimated by calculating the water requirements and the supplied water from public groundwater wells for each area. A comprehensive set of four scenarios was presented as a strategy to ensure water security and manage irrigation facilities. These scenarios comprised the maintenance of existing groundwater wells, the construction of new water storage tanks, the installation of additional groundwater wells, and the utilization of surface water. B/C (benefit/cost) analysis was conducted for each scenario. As a result, the construction of water storage tanks was selected as a facility and water management plan in Cheongyanggun, Dangjin-si, and Seosan-si. The analysis additionally indicated the economic viability of installing surface water utilization facilities in Yesan-gun and developing water storage tanks and groundwater (aquifer) wells in Goesan-gun. The results of this study are considered to serve as foundation data that may be utilized in the selection of water management plans for drought-prone areas in the future.

Keywords

drought, economic analysis, field crops, irrigation facilities, irrigation water

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