Impacts of a Groundwater Scheme on Hydroclimatological Conditions over Southern South America
Impacts of a Groundwater Scheme on Hydroclimatological Conditions over Southern South America
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DOI：
10.1175/jhm-d-16-0052.1
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发表时间：
2016-11
影响因子：
3.8
通讯作者：
J. A. Martínez;F. Dominguez;G. Miguez-Macho
中科院分区：
文献类型：
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作者：
J. A. Martínez;F. Dominguez;G. Miguez-Macho
摘要提出了南美洲南部陆地-大气耦合模拟中地下水方案对水文气象变量影响的敏感性研究。研究发现，地下水方案中的浅地下水位导致拉普拉塔盆地中部和南部部分地区的排水减少，甚至导致毛细管通量向上。这会导致根区模拟湿度的增加，进而导致该区域南部地区蒸散量 (ET) 的增加，而蒸散量 (ET) 受水限制。近地表温度也下降了 0.5°–1.0°C。在旱季，拉普拉塔中部的蒸散量和相对湿度的增加与下游降水的增加同时发生。包括地下水导致拉普拉塔盆地中部和南部部分地区在雨季初期（10 月至 12 月）降水量增加。拉普拉塔南部地区蒸散和降水量总体增加...
AbstractA sensitivity study of the impact of a groundwater scheme on hydrometeorological variables in coupled land–atmosphere simulations over southern South America is presented. It is found that shallow water tables in the groundwater scheme lead to reduced drainage and even upward capillary fluxes over parts of the central and southern La Plata basin. This leads to an increase in the simulated moisture in the root zone, which in turn produces an increase in evapotranspiration (ET) over the southern part of the domain, where ET is water limited. There is also a decrease in the near-surface temperature, in the range 0.5°–1.0°C. During the dry season, the increases in ET and relative humidity over the central La Plata coincide with an increase in precipitation downstream. Including groundwater leads to an increase in precipitation over parts of the central and southern La Plata basin during the early rainy season (October–December). The overall increase in ET and precipitation over the southern La Plata b...