Non-Negligible Lag of Groundwater Infiltration Recharge: A Case in Mu Us Sandy Land, China
| Autor: | Chen Li, Yue Yuan, Ze-Yuan Yang, Jinting Huang, Zhi-Jun Chen, Kai Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
lcsh:Hydraulic engineering
infiltration recharge lag 010504 meteorology & atmospheric sciences Geography Planning and Development 0207 environmental engineering invalid precipitation 02 engineering and technology Aquatic Science 01 natural sciences Biochemistry lcsh:Water supply for domestic and industrial purposes lcsh:TC1-978 Vadose zone semi-arid regions Precipitation 020701 environmental engineering Water content 0105 earth and related environmental sciences Water Science and Technology Hydrology lcsh:TD201-500 Mu Us Sandy Land Storm Groundwater recharge Arid Infiltration (hydrology) precipitation infiltration Environmental science shallow groundwater Groundwater |
| Zdroj: | Water, Vol 11, Iss 3, p 561 (2019) |
| ISSN: | 2073-4441 |
| DOI: | 10.3390/w11030561 |
| Popis: | Groundwater is often the main source of available water, and precipitation is one of the main recharge sources of groundwater in arid and semi-arid regions. This paper studies a fixed dune in Mu Us Sandy Land in China, establishes a numerical model, acquires hydraulic parameters and heat parameters of the vadose zone, and calculates the recharge coefficient based on field observation data and numerical modelling. These measurement results show that the response depths of storm rain are more than 90 cm, while those of small rain events are less than 10 cm. The numerical results show that infiltration depths are 10 cm for small rain and more than 90 cm for middle rain respectively. The lag time of the water content at 90 cm below the surface was 25 h following a middle rain, 18–19 h following a heavy rain, and 16–18 h following a storm rainfall. Groundwater recharge lag times (matrix flow) varied from 11 h to 48 h. Excluded precipitation for groundwater recharge was 11.25–11.75 mm in 1 h when groundwater depth was 120 cm and 15–15.5 mm when 140 cm, showing significant influence in groundwater resource evaluation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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