Document Details
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Document Type |
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Article In Journal |
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Document Title |
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Estimation of Surface Infiltration and Subsurface Percolation Rates for Namman Basin تقدير معدلات التسرب السطحي والصرف العميق خلال طبقات التربة لوادي نعمان |
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Document Language |
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Arabic |
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Abstract |
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Abstract. This study investigates infiltration and percolation processes
in Namman basin, south east of Makkah city, in the western region of
Saudi Arabia. Double ring method was used to estimate infiltration
rates in 18 sites in Namman basin and its major tributaries. Variations
of soil moisture content values with time and vertical water
percolation rates were estimated using the Neutron Probe instrument
installed at the intersection of main stream of Namman basin and one
of its major tributaries. The results of the study indicated that
infiltration rates are very high in the main channels of Namman basin
and its tributaries. The mean value of infiltration rate was about 2
cm/min, while mean values of initial and final infiltration rates were
3.7 and 1.6 cm/min, respectively. The neutron probe experiment
showed that maximum measured soil moisture value was about 24%.
Value of moisture content of soil at various soil depths has increased
by about 20% within 10 min from the beginning of the experiment. A
linear empirical relationship between wetting front arrival time and
soil depth was found and used to predict wetting front arrival time to
various soil depths. The relation also suggests that wetting front needs
about 2 h to reach depths up to 25 m provided that ponding head does
exist on the soil surface. The results of the study can be utilized for
various hydrological investigations of Namman basin such as water
budget, rainfall losses, groundwater recharge and runoff estimations. |
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ISSN |
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1319-0989 |
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Journal Name |
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Arts and Humanities Journal |
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Volume |
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21 |
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Issue Number |
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1 |
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Publishing Year |
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1431 AH
2010 AD |
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Article Type |
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Article |
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Added Date |
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Wednesday, July 11, 2012 |
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Researchers
| عبدالله سعد الوقداني | Al-Wagdany, Abdullah S | Investigator | Doctorate | AWAGDANI@KAU.EDU.SA |
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