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DOI	10.5194/hess-22-2937-2018
	Impact of capillary rise and recirculation on simulated crop yields
	Kroes J.; Supit I.; Van Dam J.; Van Walsum P.; Mulder M.
发表日期	2018
ISSN	1027-5606
起始页码	2937
结束页码	2952
卷号	22 期号:5
英文摘要	Upward soil water flow is a vital supply of water to crops. The purpose of this study is to determine if upward flow and recirculated percolation water can be quantified separately, and to determine the contribution of capillary rise and recirculated water to crop yield and groundwater recharge. Therefore, we performed impact analyses of various soil water flow regimes on grass, maize and potato yields in the Dutch delta. Flow regimes are characterized by soil composition and groundwater depth and derived from a national soil database. The intermittent occurrence of upward flow and its influence on crop growth are simulated with the combined SWAP-WOFOST model using various boundary conditions. Case studies and model experiments are used to illustrate the impact of upward flow on yield and crop growth. This impact is clearly present in situations with relatively shallow groundwater levels (85% of the Netherlands), where capillary rise is a well-known source of upward flow; but also in free-draining situations the impact of upward flow is considerable. In the latter case recirculated percolation water is the flow source. To make this impact explicit we implemented a synthetic modelling option that stops upward flow from reaching the root zone, without inhibiting percolation. Such a hypothetically moisture-stressed situation compared to a natural one in the presence of shallow groundwater shows mean yield reductions for grassland, maize and potatoes of respectively 26, 3 and 14% or respectively about 3.7, 0.3 and 1.5 t dry matter per hectare. About half of the withheld water behind these yield effects comes from recirculated percolation water as occurs in free-drainage conditions and the other half comes from increased upward capillary rise. Soil water and crop growth modelling should consider both capillary rise from groundwater and recirculation of percolation water as this improves the accuracy of yield simulations. This also improves the accuracy of the simulated groundwater recharge: neglecting these processes causes overestimates of 17% for grassland and 46% for potatoes, or 63 and 34mmyr1, respectively. © Author(s) 2018.
语种	英语
scopus关键词	Crops; Flow of water; Groundwater resources; Hydraulics; Soil moisture; Solvents; Drainage condition; Ground water depths; Ground water recharge; National soil database; Shallow groundwater; Shallow groundwater levels; Simulated ground water; Various boundary conditions; Recharging (underground waters); capillarity; crop yield; grass; groundwater; hydrological regime; maize; percolation; potato; recharge; recirculating system; simulation; soil water; water flow; yield response; Netherlands; Solanum tuberosum; Zea mays
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160021
作者单位	Kroes, J., Wageningen University and Research - Wageningen Environmental Research, Wageningen, Netherlands; Supit, I., Wageningen University and Research - Wageningen Environmental Research, Wageningen, Netherlands, Wageningen University and Research - Department of Water Systems and Global Change, Wageningen, Netherlands; Van Dam, J., Wageningen University and Research - Department of Soil Physics and Land Management, Wageningen, Netherlands; Van Walsum, P., Wageningen University and Research - Wageningen Environmental Research, Wageningen, Netherlands; Mulder, M., Wageningen University and Research - Wageningen Environmental Research, Wageningen, Netherlands
推荐引用方式 GB/T 7714	Kroes J.,Supit I.,Van Dam J.,et al. Impact of capillary rise and recirculation on simulated crop yields[J],2018,22(5).
APA	Kroes J.,Supit I.,Van Dam J.,Van Walsum P.,&Mulder M..(2018).Impact of capillary rise and recirculation on simulated crop yields.Hydrology and Earth System Sciences,22(5).
MLA	Kroes J.,et al."Impact of capillary rise and recirculation on simulated crop yields".Hydrology and Earth System Sciences 22.5(2018).