Evaluating Regional Solutions to Salinization and Waterlogging in an Irrigated River Valley
Evaluating Regional Solutions to Salinization and Waterlogging in an Irrigated River Valley
复制标题
评估灌溉河谷盐碱化和内涝的区域解决方案
DOI：
--
复制
发表时间：
2006
期刊：
影响因子：
--
通讯作者：
T. Gates
中科院分区：
文献类型：
--
作者：
J. P. Burkhalter;T. Gates
本文利用校准过的有限差分流量和质量输运模型，对科罗拉多州阿肯色河下游流域的部分地区进行了区域尺度上的研究，研究了高土壤盐度和内涝问题的潜在解决方案。在三个灌溉季节（1999-2001）中，共有38种替代方案，包括不同程度的补给减少、渠道渗漏减少、地下排水装置和抽水量增加。与现有条件相比，使用六个绩效指标来评估这些替代方案在改善农业生态条件方面的有效性。对所选择的替代方案提出了预测的区域平均地下水位下降（在灌溉季节高达1.93 m），并对结果进行了空间制图。土壤盐分浓度的下降（区域和季节平均下降高达950 mg/L）也被预测和绘制。估计地下水盐度的变化，总盐的减少…
Potential solutions to high soil salinity levels and waterlogging problems are investigated on a regional scale using calibrated finite-difference flow and mass transport modeling for a portion of the Lower Arkansas River Valley in Colorado. A total of 38 alternatives incorporating varying degrees of recharge reduction, canal seepage reduction, subsurface drainage installation, and pumping volume increases are modeled over three irrigation seasons (1999–2001). Six performance indicators are used to evaluate the effectiveness of these alternatives in improving agroecological conditions, compared to existing conditions. Predicted average regional decrease in water table elevation (as great as 1.93 m over the irrigation season) is presented for selected alternatives, as well as the spatial mapping of results. Decrease in soil salinity concentration (with regional and seasonal average reduction as high as 950 mg/L) is also predicted and mapped. Estimated groundwater salinity changes, reduction in total salt l...