| Effects of saline water with different sodium\|to\|potassium ratios on water infiltration and distribution of water and salt |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2023.03.20 |
| Key Words: Na+∶K+ saline water water infiltration infiltration model water and salt transport |
| Author Name | Affiliation | | YAN Sihui | College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | WANG Nannan | College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | MENG Yuting | College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHEN Xin | College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | QU Jiayue | College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | CHEN Xiaoyang | College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China | | ZHANG Tibin | College of Water Resource and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, China
Institute of Water and Soil Conservation, Northwest A&F University, Yangling, Shaanxi 712100， China |
|
| Hits: 453 |
| Download times: 354 |
| Abstract: |
| To explore the effects of saline water with different sodium\|to\|potassium ratios (Na+∶K+) on soil infiltration performance and transport characteristics of water and salt, an indoor one\|dimensional soil column infiltration test was carried out. Four treatments were set up with deionized water as the control (CK) and three saline water treatments with the same electrical conductivity. Different Na+∶K+ratios were 1∶0（S1）, 1∶1（S2） and 0∶1（S3）, respectively. Soil water infiltration process was analyzed, and the infiltration results were fitted by Philip, Green-Ampt and Kostiakov infiltration models. In addition, this study analyzed the variation of electrical conductivity and turbidity of leaching solution as well as the distribution characteristics of water and salt. The results showed that (1) Compared with CK, S1, S2 and S3 all reduced the wetting front movement distance at the same time, and when the infiltration time reached 600 min, distance of S1, S2 and S3 were 41.31%, 28.75% and 19.94% lower than CK, respectively. There was no significant difference between the S2 and S3 treatment within 0~60 min, however, after 60 min, the rate of wetting front movement of S2 was greater than S3. Kostiakov infiltration model had better fitting effects than Philip and Green-Ampt infiltration models. (2) The accumulation rates of S1, S2 and S3 were 76.11%, 74.16% and 73.25%, respectively. The turbidity of all treatments in the 0~1 000 min period of leaching time was in the order of S1 > S2 > S3 > CK. (3) Compared with CK, all of S1, S2 and S3 did not change the total water content in soil column, however, increased the uniformity of water content distribution along soil column profile. The coefficient of variation along soil column section of S1, S2 and S3 were 3.99, 3.26 and 1.62 times than CK, respectively. S1, S2 and S3 increased soil salt content compared with CK, and salt accumulated in 0~5 cm and 35~40 cm of S1, and the effect of salt accumulation of S1 was higher than S2 and S3. S1, S2 and S3 all reduced the soil pH, and the decreasing degree of S1 was greater than S2 and S3. This study provides theoretical support for long\|term and efficient utilization of saline water. |
|
|
|