Hydrological Modeling of the Effect of the Transition From Flood to Drip Irrigation on Groundwater Recharge Using Multi‐Objective Calibration

Abstract

 We developed a modelling approach to simulate the impacts of a transition from flood to drip irrigation on basin scale groundwater recharge. Annual recharge was strongly related to annual rainfall, but to a much smaller extent to irrigation practice. Sensitivity of daily recharge to single precipitation events was stronger in drip irrigation than in flood irrigation.

Competency of groundwater recharge of irrigated cotton field subjacent to sowing methods, plastic mulch, water productivity, and yield under climate change

“…6 ). Meanwhile, groundwater recharge declines an additional 10% in drip irrigation compared to flood irrigation fields (Pool et al 2021a ). However, cover crops provide a service to nitrate pollution mitigation that can reduce groundwater recharge due to higher evapotranspiration than bare soil for water balance (Meyer et al 2019 ).…”

“…Estimating groundwater recharge is one of the provoking duties due to hydrologic and environmental applications; vulnerability is attributed to climate change (Şen 2015 ; Usman et al 2020 ), becoming more sensitive to irrigated crops (Ficklin et al 2010 ; Hama et al 2020 ). Increasing temperature (5.7 °C annually by the late twenty-first century) is declining rainfall (11.9% in the mid-twenty-first century) (Dahri et al 2021 ) that is strongly related to groundwater recharge (Pool et al 2021a ). Irrigated (paddy) field has a high potential for percolation of water over 30 mm.day −1 that could be increased by efficient irrigation and crop management practices (Hama et al 2020 ).…”

Exploring the Implications of Modeling Choices on Prediction of Irrigation Water Savings

“…A testament to the difficulty of using such information is their reliance on “expert knowledge”, and short records for calibration. Calibrating hydrologic models that include representations of human activities is incredibly difficult (Condon & Maxwell, 2014; O’Keeffe et al., 2018; Pool et al., 2021; Xu et al., 2019). This is partly because the hydrologic response to human activities is difficult to isolate from the hydrologic response to other environmental effects, and observations are scarce.…”

“…However, the calibration process did not consider a host of other relevant processes that are relevant for irrigation. For example, Pool et al (2021) use spatially aggregated metrics related to evaporation, groundwater, and soil moisture to calibrate their model. A testament to the difficulty of using such information is their reliance on "expert knowledge", and short records for calibration.…”