A soil-water-balance approach to quantify groundwater recharge from irrigated cropland in the North China Plain
文献类型：SCI/SSCI论文
| 作者 | Kendy E. ; Gerard-Marchant P. ; Walter M. T. ; Zhang Y. Q. ; Liu C. M. ; Steenhuis T. S. |
| 发表日期 | 2003 |
| 关键词 | recharge water balance soil moisture infiltration evapotranspiration irrigation drainage North China Plain model regions systems runoff issues areas field |
| 英文摘要 | Rapidly depleting unconfined aquifers are the primary source of water for irrigation on the North China Plain. Yet, despite its critical importance, groundwater recharge to the Plain remains an enigma. We introduce a one-dimensional soil-water-balance model to estimate precipitation- and irrigation-generated areal recharge from commonly available crop and soil characteristics and climate data. To limit input data needs and to simplify calculations, the model assumes that water flows vertically downward under a unit gradient; infiltration and evapotranspiration are separate, sequential processes; evapotranspiration is allocated to evaporation and transpiration as a function of leaf-area index and is limited by soil-moisture content; and evaporation and transpiration are distributed through the soil profile as exponential functions of soil and root depth, respectively. For calibration, model-calculated water contents of I I soil-depth intervals from 0 to 200 cm were compared with measured water contents of loam soil at four sites in Luancheng County, Hebei Province, over 3 years (1998-2001). Each 50-m(2) site was identically cropped with winter wheat and summer maize, but received a different irrigation treatment. Average root mean-squared error between measured and model-calculated water content of the top 180 cm was 4.2 cm, or 9.3% of average total water content. In addition, model-calculated evapotranspiration compared well with that measured by a large-scale lysimeter. To test the model, 12 additional sites were simulated successfully. Model results demonstrate that drainage from the soil profile is not a constant fraction of precipitation and irrigation inputs, but rather the fraction increases as the inputs increase. Because this drainage recharges the underlying aquifer, improving irrigation efficiency by reducing seepage will not reverse water-table declines. Copyright (C) 2003 John Wiley Sons, Ltd. |
| 出处 | Hydrological Processes |
| 卷 | 17 |
| 期 | 10 |
| 页 | 2011-2031 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 0885-6087 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23717]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Kendy E.,Gerard-Marchant P.,Walter M. T.,et al. A soil-water-balance approach to quantify groundwater recharge from irrigated cropland in the North China Plain. 2003. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。