Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh Desert
[Objective] The spatial-temporal patterns of soil water at the inter-dune area of Nitraria tangutorum nebkhas and its response to rainfall changes were determined in order to provide a scientific basis and data support for the accurate assessment of the role of inter-dunes in the soil water cycle an...
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Science Press
2022-12-01
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| Series: | Shuitu baochi tongbao |
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| Online Access: | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220605 |
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| author | Xinle Li Yajing Liu Fei Sun Danyang Wang Jingyuan An Ren Mu Jingbo Zhang |
| author_facet | Xinle Li Yajing Liu Fei Sun Danyang Wang Jingyuan An Ren Mu Jingbo Zhang |
| author_sort | Xinle Li |
| collection | DOAJ |
| description | [Objective] The spatial-temporal patterns of soil water at the inter-dune area of Nitraria tangutorum nebkhas and its response to rainfall changes were determined in order to provide a scientific basis and data support for the accurate assessment of the role of inter-dunes in the soil water cycle and soil water stability in Nitraria tangutorum nebkhas. [Methods] The EM50 automated soil moisture measurement system was used to acquire long-term in-situ measurements of soil moisture in the clay layer of the inter-dune area. We analyzed the spatial patterns and temporal dynamics of soil water in the inter-dune soils under different rainfall conditions, quantifying the relationship between rainfall, soil water content before rainfall, and soil water infiltration and retention time in the inter-dune clay layer. [Results] ① From the perspective of the spatial variation characteristics of soil water in the clay layer, the variation degree of soil water in the 0-25 cm soil layer was characterized as moderate variation, among which the surface layer (0-15 cm) had greater variability and the lower layer (below 15 cm) had less variability. ② The magnitude of rainfall determined the infiltration depth and retention time of soil water at the inter-dune area after rainfall. As the average rainfall increased by 1 mm, the infiltration depth of soil water in the clay layer increased by 0.57 cm, and the soil water retention time increased by 1.05 days. Excessive soil water content before a rainfall event inhibited the continuous infiltration of soil water in the clay layer, but had a significant positive effect on soil water retention time after the rainfall, as shown by a 1% increase in soil water content before a rainfall event, and a 0.02 cm decrease in infiltration depth per unit rainfall, while the soil water retention time of the clay layer increased by 9.85 days. ③ Heavy rainfall events (> 20 mm) had an obvious replenishment effect on soil water in the clay layer, and the soil water decreased slowly after rainfall. [Conclusion] The inter-dune clay layer can inhibit soil water evaporation and provide good water storage and water retention. |
| format | Article |
| id | doaj-art-e328043854f742d586a00e30dc485940 |
| institution | Kabale University |
| issn | 1000-288X |
| language | zho |
| publishDate | 2022-12-01 |
| publisher | Science Press |
| record_format | Article |
| series | Shuitu baochi tongbao |
| spelling | doaj-art-e328043854f742d586a00e30dc4859402024-12-26T02:50:26ZzhoScience PressShuitu baochi tongbao1000-288X2022-12-01426394610.13961/j.cnki.stbctb.2022.06.0051000-288X(2022)06-0039-08Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh DesertXinle Li0Yajing Liu1Fei Sun2Danyang Wang3Jingyuan An4Ren Mu5Jingbo Zhang6Experimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, ChinaExperimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, ChinaExperimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, ChinaExperimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, ChinaExperimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, ChinaExperimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, ChinaExperimental Center of Desert Forestry, Chinese Academy of Forestry, Dengkou, Inner Mongolia 015200, China[Objective] The spatial-temporal patterns of soil water at the inter-dune area of Nitraria tangutorum nebkhas and its response to rainfall changes were determined in order to provide a scientific basis and data support for the accurate assessment of the role of inter-dunes in the soil water cycle and soil water stability in Nitraria tangutorum nebkhas. [Methods] The EM50 automated soil moisture measurement system was used to acquire long-term in-situ measurements of soil moisture in the clay layer of the inter-dune area. We analyzed the spatial patterns and temporal dynamics of soil water in the inter-dune soils under different rainfall conditions, quantifying the relationship between rainfall, soil water content before rainfall, and soil water infiltration and retention time in the inter-dune clay layer. [Results] ① From the perspective of the spatial variation characteristics of soil water in the clay layer, the variation degree of soil water in the 0-25 cm soil layer was characterized as moderate variation, among which the surface layer (0-15 cm) had greater variability and the lower layer (below 15 cm) had less variability. ② The magnitude of rainfall determined the infiltration depth and retention time of soil water at the inter-dune area after rainfall. As the average rainfall increased by 1 mm, the infiltration depth of soil water in the clay layer increased by 0.57 cm, and the soil water retention time increased by 1.05 days. Excessive soil water content before a rainfall event inhibited the continuous infiltration of soil water in the clay layer, but had a significant positive effect on soil water retention time after the rainfall, as shown by a 1% increase in soil water content before a rainfall event, and a 0.02 cm decrease in infiltration depth per unit rainfall, while the soil water retention time of the clay layer increased by 9.85 days. ③ Heavy rainfall events (> 20 mm) had an obvious replenishment effect on soil water in the clay layer, and the soil water decreased slowly after rainfall. [Conclusion] The inter-dune clay layer can inhibit soil water evaporation and provide good water storage and water retention.http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220605ulan buh desertclay layer between inter-dunessoil water contentspatial patterntime dynamics |
| spellingShingle | Xinle Li Yajing Liu Fei Sun Danyang Wang Jingyuan An Ren Mu Jingbo Zhang Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh Desert Shuitu baochi tongbao ulan buh desert clay layer between inter-dunes soil water content spatial pattern time dynamics |
| title | Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh Desert |
| title_full | Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh Desert |
| title_fullStr | Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh Desert |
| title_full_unstemmed | Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh Desert |
| title_short | Spatial-temporal Patterns of Soil Water in Clay Layer at Inter-dune Area of Nitraria Tangutorum and Its Response to Rainfall Changes in Ulan Buh Desert |
| title_sort | spatial temporal patterns of soil water in clay layer at inter dune area of nitraria tangutorum and its response to rainfall changes in ulan buh desert |
| topic | ulan buh desert clay layer between inter-dunes soil water content spatial pattern time dynamics |
| url | http://stbctb.alljournal.com.cn/stbctben/article/abstract/20220605 |
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