Academic Journal
Bare‐Soil Evaporation Under Semiarid Field Conditions
| العنوان: | Bare‐Soil Evaporation Under Semiarid Field Conditions |
|---|---|
| المؤلفون: | Wythers, K. R., Lauenroth, W. K., Paruelo, J. M. |
| المساهمون: | National Science Foundation |
| المصدر: | Soil Science Society of America Journal ; volume 63, issue 5, page 1341-1349 ; ISSN 0361-5995 1435-0661 |
| بيانات النشر: | Wiley |
| سنة النشر: | 1999 |
| المجموعة: | Wiley Online Library (Open Access Articles via Crossref) |
| الوصف: | Bare‐soil evaporation is an important component of the water balance in semiarid systems. However, little is known quantitatively about the influence of soil texture on bare‐soil evaporation. We hypothesized that soil texture would have a great influence on both the temporal dynamics of bare‐soil evaporation as well as on the depth to which evaporation‐influenced soil water content throughout a 51‐d simulated drought period. We measured soil water in lysimeters filled with three different soils. We measured daily evaporation gravimetrically and estimated evaporation rates using the energy balance method of Ben‐Asher et al. We estimated soil water content at depths of 3.8 cm, 11.4 cm, 19.0 cm, 26.6 cm, and 34.2 cm (Layers 1–5, respectively) with time domain reflectometry rods and with soil cores. Bare‐soil evaporation during the first 15 d of the experiment was ≈25% higher in the silt loam than the sand loam, and ≈42% higher than the clay loam. By Day 30, bare‐soil evaporation in all soils was ≈0.5 mm d −1 Soil water content decreased in all five lysimeters layers, and it was related to time and depth ( r 2 values ranged from 0.60 to 0.95). The slope describing change in soil water content was greatest in the top 3.8‐cm layer in all soil types (−0.52 in the clay loam, −0.32 in the silt loam, and −0.21 in the sand loam). At 14 d, bare‐soil evaporation had the greatest influence on the upper 4.62 cm in the sand loam and the upper 7.18 cm in the clay and silt loams. At 51 d bare‐soil evaporation had the greatest influence on the upper 7.36 cm in the sand loam, the upper 9.79 cm in the silt loam and the upper 14.1 cm in the clay loam. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| DOI: | 10.2136/sssaj1999.6351341x |
| الاتاحة: | http://dx.doi.org/10.2136/sssaj1999.6351341x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2136%2Fsssaj1999.6351341x https://onlinelibrary.wiley.com/doi/pdf/10.2136/sssaj1999.6351341x https://onlinelibrary.wiley.com/doi/full-xml/10.2136/sssaj1999.6351341x |
| Rights: | http://onlinelibrary.wiley.com/termsAndConditions#vor |
| رقم الانضمام: | edsbas.720D0AFF |
| قاعدة البيانات: | BASE |
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