APPOINTMENT OF WELL SHAPE FACTOR IS APPROPRIATE METHOD TO IMPROVE GUELPH PERMEAMETER RESULTS

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KHARAZMI A.; MASHAL M.; ZAREI GH.; VARAVIPOUR M.

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Journal: Journal of Water Research in Agriculture Year:2012 | Volume:26 | Issue:3 Page(s): 251-261

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Title

APPOINTMENT OF WELL SHAPE FACTOR IS APPROPRIATE METHOD TO IMPROVE GUELPH PERMEAMETER RESULTS

Author(s)

KHARAZMI A. | MASHAL M. | ZAREI GH. | VARAVIPOUR M. | Issue Writer Certificate

Keywords

KEY WORDS: HEAVY TEXTURED SOILQ2

WELL SHAPE FACTORQ2

FIELD SATURATED HYDRAULIC CONDUCTIVITYQ2

Abstract

The Guelph Permeameter technique (GP) is one of the proper methods for measuring the saturated hydraulic conductivity (Kfs) above the water table. This study was done by Guelph Permeameter model 2800kl in 20 auger holes at Research Farm of Abourayhan Campus. Soil texture was determined for the Research Farm, using the hydrometer method. Water outlet flow of the permeameter was measured in four phases under constant ponding heads (H) of 5, 10, 15 and 20 ern, respectively. The FIELD SATURATED HYDRAULIC CONDUCTIVITY (Kfs) and matric flux potential (Øm)' based on successful testing and Guelph analysis, were evaluated by different methods. The results indicated that, in heavy soils, increasing submergence depth of I-h relative to HI, is an appropriate solution for reducing the Guelph's two-head analysis failure in soil hydraulic conductivity estimation. In this study, WELL SHAPE FACTOR (C) was also calculated by five different methods. Later, the effect of the calculated C factor by various methods was studied in Guelph's two-head analysis. The results showed that using unsaturated effect in the calculations lowers the possibility of obtaining negative values of Kfs and Øm in Xiang Solution. Also, there was a very high correlation between Guelph successful two-head analysis when Xiang and Numeral Solutions were used for calculating C factor (r=0.98).

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APA: Copy

KHARAZMI, A., MASHAL, M., ZAREI, GH., & VARAVIPOUR, M.. (2012). APPOINTMENT OF WELL SHAPE FACTOR IS APPROPRIATE METHOD TO IMPROVE GUELPH PERMEAMETER RESULTS. IRANIAN JOURNAL OF WATER RESEARCH IN AGRICULTURE (FORMERLY SOIL AND WATER SCIENCES), 26(3), 251-261. SID. https://sid.ir/paper/196748/en

Vancouver: Copy

KHARAZMI A., MASHAL M., ZAREI GH., VARAVIPOUR M.. APPOINTMENT OF WELL SHAPE FACTOR IS APPROPRIATE METHOD TO IMPROVE GUELPH PERMEAMETER RESULTS. IRANIAN JOURNAL OF WATER RESEARCH IN AGRICULTURE (FORMERLY SOIL AND WATER SCIENCES)[Internet]. 2012;26(3):251-261. Available from: https://sid.ir/paper/196748/en

IEEE: Copy

A. KHARAZMI, M. MASHAL, GH. ZAREI, and M. VARAVIPOUR, “APPOINTMENT OF WELL SHAPE FACTOR IS APPROPRIATE METHOD TO IMPROVE GUELPH PERMEAMETER RESULTS,” IRANIAN JOURNAL OF WATER RESEARCH IN AGRICULTURE (FORMERLY SOIL AND WATER SCIENCES), vol. 26, no. 3, pp. 251–261, 2012, [Online]. Available: https://sid.ir/paper/196748/en

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