The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the Plains
In order to study the soil–water characteristic curve and soil–water movement in the unsaturated zone of the humid plain area and investigate its influence on the regional water cycle process, this study conducted a long series of hydrometeorological data monitoring on the whole process of precipita...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/14/24/4012 |
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| author | Pingnan Zhang Gang Chen Jinning Wu Chuanhai Wang Shiwei Zheng Yue Yu Youlin Li Xiaoning Li |
| author_facet | Pingnan Zhang Gang Chen Jinning Wu Chuanhai Wang Shiwei Zheng Yue Yu Youlin Li Xiaoning Li |
| author_sort | Pingnan Zhang |
| collection | DOAJ |
| description | In order to study the soil–water characteristic curve and soil–water movement in the unsaturated zone of the humid plain area and investigate its influence on the regional water cycle process, this study conducted a long series of hydrometeorological data monitoring on the whole process of precipitation, evaporation, soil water content, pore water pressure and depth of groundwater level at the Jintan field hydrological test in the plain area of the Taihu Basin, China. Based on the collected data, the soil water dynamic at different depths was analyzed, and the results showed that the soil water fluctuated most frequently and drastically at a soil horizon depth of 0–40 cm, with an obvious soil moisture wetting and drying cycle. The van Genuchten model (VG model) was used to describe the soil–water characteristic curve, and the parameters of the VG model were obtained by numerical inversion of field monitoring data using numerical code (HYDRUS-1D). The obtained parameters were used to simulate soil water movement in each soil horizon for six precipitation events and were compared with the simulation results of laboratory data. The study shows that the soil water simulation based on field data is better, which verifies the accuracy and reliability of the VG model obtained from field observation and provides a reliable theoretical basis for soil water movement and the calculation of runoff yield in the plain area of the Taihu Basin. |
| first_indexed | 2024-03-09T15:43:42Z |
| format | Article |
| id | doaj.art-4c3e370b89cc4f23b45d7b8c10891171 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-09T15:43:42Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-4c3e370b89cc4f23b45d7b8c108911712023-11-24T18:41:20ZengMDPI AGWater2073-44412022-12-011424401210.3390/w14244012The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the PlainsPingnan Zhang0Gang Chen1Jinning Wu2Chuanhai Wang3Shiwei Zheng4Yue Yu5Youlin Li6Xiaoning Li7College of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaChangzhou Branch of Jiangsu Province Hydrology and Water Resources Survey Bureau, Changzhou 213022, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaCollege of Hydrology and Water Resources, Hohai University, Nanjing 210098, ChinaIn order to study the soil–water characteristic curve and soil–water movement in the unsaturated zone of the humid plain area and investigate its influence on the regional water cycle process, this study conducted a long series of hydrometeorological data monitoring on the whole process of precipitation, evaporation, soil water content, pore water pressure and depth of groundwater level at the Jintan field hydrological test in the plain area of the Taihu Basin, China. Based on the collected data, the soil water dynamic at different depths was analyzed, and the results showed that the soil water fluctuated most frequently and drastically at a soil horizon depth of 0–40 cm, with an obvious soil moisture wetting and drying cycle. The van Genuchten model (VG model) was used to describe the soil–water characteristic curve, and the parameters of the VG model were obtained by numerical inversion of field monitoring data using numerical code (HYDRUS-1D). The obtained parameters were used to simulate soil water movement in each soil horizon for six precipitation events and were compared with the simulation results of laboratory data. The study shows that the soil water simulation based on field data is better, which verifies the accuracy and reliability of the VG model obtained from field observation and provides a reliable theoretical basis for soil water movement and the calculation of runoff yield in the plain area of the Taihu Basin.https://www.mdpi.com/2073-4441/14/24/4012soil–water characteristic curve (SWCC)wetting and drying cyclenumerical inversionsoil water movementprecipitation event simulationplain area |
| spellingShingle | Pingnan Zhang Gang Chen Jinning Wu Chuanhai Wang Shiwei Zheng Yue Yu Youlin Li Xiaoning Li The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the Plains Water soil–water characteristic curve (SWCC) wetting and drying cycle numerical inversion soil water movement precipitation event simulation plain area |
| title | The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the Plains |
| title_full | The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the Plains |
| title_fullStr | The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the Plains |
| title_full_unstemmed | The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the Plains |
| title_short | The Application and Improvement of Soil–Water Characteristic Curves through In Situ Monitoring Data in the Plains |
| title_sort | application and improvement of soil water characteristic curves through in situ monitoring data in the plains |
| topic | soil–water characteristic curve (SWCC) wetting and drying cycle numerical inversion soil water movement precipitation event simulation plain area |
| url | https://www.mdpi.com/2073-4441/14/24/4012 |
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