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Analysis of saline groundwater infiltration into two loam soils
Land Degradation & Development ( IF 4.7 ) Pub Date : 2018-07-31 , DOI: 10.1002/ldr.3089
Junna Sun 1, 2 , Fuhong He 1 , Zhenhua Zhang 1 , Hongbo Shao 3, 4 , Yinghua Pan 1 , Runya Yang 2 , Wenxue Li 1 , Peng Li 1 , Mengzhu Zheng 2
Affiliation  

Irrigation with saline groundwater may cause salt accumulation in the soil and even land degradation in coastal areas. The aim of this study was to reveal how the changes in groundwater salinity affect the infiltration characteristics under controlled conditions. One‐dimensional vertical infiltration experiments were conducted in uniform columns of silty clay‐loam and sandy‐loam under different salinity levels of irrigation groundwater (0, 1, 2, 3, 6, 9, and 12 g L−1 NaCl). The results showed that as groundwater salinity increased, the infiltration capacity of the silty clay‐loam increased under low salinity levels but decreased under higher salinity levels, with a turning point at the salinity of 6 g L−1 NaCl. However, there were no significant differences in the infiltration capacity of the sandy‐loam under salinity levels of 1–9 g L−1 NaCl, whereas a significant increase was found under 12 g L−1 NaCl. The infiltration capacity of the sandy‐loam was consistently higher compared with the silty clay‐loam under different salinity levels. Under short‐term irrigation with a conventional amount of 750–900 m3 ha−1, extracting groundwater with the salinity of <6 g L−1 NaCl obtained higher desalination efficiency in the silty clay‐loam and resulted in less salt accumulation in the surface soil (0–20 cm). Under the same amount of irrigation with groundwater containing 1–12 g L−1 NaCl, the increase of soil salt content was relatively small in the sandy‐loam and might not significantly affect crop growth.

中文翻译:

两种壤土中盐分地下水的入渗分析

用盐水地下水灌溉可能会导致盐分在土壤中的积累,甚至导致沿海地区的土地退化。这项研究的目的是揭示在控制条件下地下水盐度的变化如何影响入渗特性。在不同盐度的灌溉地下水(0、1、2、3、6、9和12 g L -1 NaCl)下,在粉质粘土质壤土和砂质壤土的均匀柱中进行一维垂直渗透试验。结果表明,随着地下水盐度的增加,粉质黏土壤土的渗透能力在低盐度水平下增加,但在较高盐度水平下下降,转折点为盐度为6 g L -1。氯化钠 然而,在盐度为1–9 g L -1 NaCl的条件下,沙壤土的入渗能力没有显着差异,而在12 g L -1 NaCl的盐度下,沙壤土的渗透能力却没有显着差异。在不同盐度下,沙质壤土的渗透能力始终高于粉质质粘土。在常规灌溉量为750–900 m 3  ha -1的短期灌溉下,提取盐分小于6 g L -1 NaCl的地下水在粉质粘土壤土中获得了更高的脱盐效率,并导致了盐分中更少的盐分积累。表土(0–20厘米)。在相同的灌溉量下,含1–12 g L -1的地下水 NaCl,沙壤土中土壤盐分的增加相对较小,可能不会显着影响农作物的生长。
更新日期:2018-07-31
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