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Article

Water Supply Reliability of Agricultural Reservoirs under Varying Climate and Rice Farming Practices

1
Department of Agricultural Civil Engineering, Kyungpook National University, Daegu 41566, Korea
2
Department of Agricultural Civil Engineering, Institute of Agricultural Sciences & Technology, Kyungpook National University, Daegu 41566, Korea
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Author to whom correspondence should be addressed.
Academic Editor: José Gutiérrez-Pérez
Water 2021, 13(21), 2988; https://doi.org/10.3390/w13212988
Received: 23 September 2021 / Revised: 19 October 2021 / Accepted: 20 October 2021 / Published: 22 October 2021
(This article belongs to the Section Water and Climate Change)
Technological development and climate change dictate farming practices, which can directly affect irrigation water requirement and supply. In this article, the water supply reliability (WSR) of 62 major Korean agricultural reservoirs was comprehensively evaluated for varying climate and farming practices. Field surveys identified the recent divergence from standard rice farming practices and a 45-year daily weather data set (1973–2017) was examined to understand the phenomenon of climate change. Effective rainfall increments mitigated the imminent surges in rice irrigation water requirements driven by warming-led accelerated crop evapotranspiration rates; therefore, climate change marginally influenced the WSR of selected reservoirs. The transplanting period and associated water consumption were the primary deviations from standard rice farming practices. A significantly prolonged transplanting period seriously compromised the WSR of agricultural reservoirs and the maximum number of unsafe reservoirs was detected for a 24-day increase in the transplanting period. A watershed/irrigated area ratio of less than 2.5 was the lower threshold below which all the reservoirs had unsafe WSR regardless of the climate change and/or farming practices. Recent variations in farming practices were the primary cause of reservoir failure in maintaining the WSR. View Full-Text
Keywords: climate change; rice farming practices; irrigation water requirement; water supply reliability; agricultural reservoirs climate change; rice farming practices; irrigation water requirement; water supply reliability; agricultural reservoirs
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MDPI and ACS Style

Cho, G.-H.; Ahmad, M.J.; Choi, K.-S. Water Supply Reliability of Agricultural Reservoirs under Varying Climate and Rice Farming Practices. Water 2021, 13, 2988. https://doi.org/10.3390/w13212988

AMA Style

Cho G-H, Ahmad MJ, Choi K-S. Water Supply Reliability of Agricultural Reservoirs under Varying Climate and Rice Farming Practices. Water. 2021; 13(21):2988. https://doi.org/10.3390/w13212988

Chicago/Turabian Style

Cho, Gun-Ho, Mirza Junaid Ahmad, and Kyung-Sook Choi. 2021. "Water Supply Reliability of Agricultural Reservoirs under Varying Climate and Rice Farming Practices" Water 13, no. 21: 2988. https://doi.org/10.3390/w13212988

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