AN APPLICATION OF WIND ROSE, STORM ROSE, AND SAND ROSE IN THE ANALYSIS OF WIND EROSION AND DETERMINING THE DIRECTION OF MOVING SANDS (CASE STUDY AREA: YAZD– ARDAKAN BASIN)

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EKHTESASI M.R.; AHMADI HASAN; KHALILI A.; SAREMI NAEINI M.A.; RAJABI MOHAMMAD REZA

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Journal: IRANIAN JOURNAL OF NATURAL RESOURCES Year:2006 | Volume:59 | Issue:3 Page(s): 533-541

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Title

AN APPLICATION OF WIND ROSE, STORM ROSE, AND SAND ROSE IN THE ANALYSIS OF WIND EROSION AND DETERMINING THE DIRECTION OF MOVING SANDS (CASE STUDY AREA: YAZD– ARDAKAN BASIN)

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Keywords

WIND ROSEQ3

DUST STORM ROSEQ3

SAND ROSEQ3

WIND EROSIONQ4

THRESHOLD VELOCITYQ3

WIND TUNNELQ3

WIND EROSION METERQ3

YAZDQ4

IRANQ4

Abstract

Yazd– Ardakan basin is one of the areas exposed to WIND EROSION and dust storms. This basin is located in the center of IRAN, northwest of YAZD. Since analysis of anemometric data has a special importance for evaluating and distinguishing erosive storm winds, so in this survey, anemometric data of a duration period of about 20 years (1982-2000) from synoptic station of YAZD have been taken and analyzed through different methods. Results obtained from analysis of data through "WRPLOT"(WIND ROSE plot software) indicated that the direction of prevailing winds in YAZD basin is generally from west to north-west (W-NW). The southeast (SE) direction comes next in level. Among the anemometric data employed in this research, the frequency percentage of calm winds with a velocity of less than one knot (0.54meter per second) was estimated to be 47.6%. Results obtained, after determining and drawing storm rose, indicate that based on minimum THRESHOLD VELOCITY (about 6.5 m/s on the fine grain plain), dust storm winds in YAZD plain have been generally directed northwest. The other west sector winds, including those towards west and south west direction, were almost of the same nature, while southeast winds played a less important role. Based on storm rose, frequency of wind of less velocity less than 6.5 m/s (threshold velocity) is 97% as observed from YAZD station. So the frequency of dust stormy winds is reduced to 3%. The obtained results indicate that the NW, SW and W winds have the most drift potential (DP) respectively while other winds are of less power for carrying sands. The resultant drift direction (RDD), has been determined as from southwest-west (SWW) towards northeast-east (NEE). The angular direction in this respect estimated as is 77 degrees, measured clockwise from the geographical north.

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APA: Copy

EKHTESASI, M.R., AHMADI, HASAN, KHALILI, A., SAREMI NAEINI, M.A., & RAJABI, MOHAMMAD REZA. (2006). AN APPLICATION OF WIND ROSE, STORM ROSE, AND SAND ROSE IN THE ANALYSIS OF WIND EROSION AND DETERMINING THE DIRECTION OF MOVING SANDS (CASE STUDY AREA: YAZD– ARDAKAN BASIN). IRANIAN JOURNAL OF NATURAL RESOURCES, 59(3), 533-541. SID. https://sid.ir/paper/23092/en

Vancouver: Copy

EKHTESASI M.R., AHMADI HASAN, KHALILI A., SAREMI NAEINI M.A., RAJABI MOHAMMAD REZA. AN APPLICATION OF WIND ROSE, STORM ROSE, AND SAND ROSE IN THE ANALYSIS OF WIND EROSION AND DETERMINING THE DIRECTION OF MOVING SANDS (CASE STUDY AREA: YAZD– ARDAKAN BASIN). IRANIAN JOURNAL OF NATURAL RESOURCES[Internet]. 2006;59(3):533-541. Available from: https://sid.ir/paper/23092/en

IEEE: Copy

M.R. EKHTESASI, HASAN AHMADI, A. KHALILI, M.A. SAREMI NAEINI, and MOHAMMAD REZA RAJABI, “AN APPLICATION OF WIND ROSE, STORM ROSE, AND SAND ROSE IN THE ANALYSIS OF WIND EROSION AND DETERMINING THE DIRECTION OF MOVING SANDS (CASE STUDY AREA: YAZD– ARDAKAN BASIN),” IRANIAN JOURNAL OF NATURAL RESOURCES, vol. 59, no. 3, pp. 533–541, 2006, [Online]. Available: https://sid.ir/paper/23092/en

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