استعمال الاستدارة و فرز الاستدارة في تفسیر نمط توزیع واشكال وحدات خرائط الترب في مشروع المسیب الكبیر

Abstract

Large – Almusseiyab soils survey project in mid Mesopotamian plain have been chosen , because of its variation in soil series and reiteration map units, to calculate the roundness of map units and roundness sorting values, in order to use them as a pattern of map units shapes which help in interpret the distribution and shapes of map units, which they were (18) soil series in (141) reiteration. Calculate each map units roundness have been done and its value ranged between (0.09) to (0.51), The average of roundness ranged between (0.250) for each MM1, MW5 soil series ,and (0.317) for DW45 . 99.30 % of samples were not good roundness and with many sineuosity. The second group was a largest percentage 38.88 % with range of angles 6 – 7. The less value of Circularity four factor was (0.11) in MM11 soil series, when the high value was (0.83) in DW56. The unit MM11 was considered as a key map unit that appears in the soil of Large - Almuseiyab project, which may be used to expect another map units existence in area of that project, which is considered an important in soil survey works and management of soils their. All soil series appeared with poor roundness sorting ranged between (2.04) in DM115 soil series to ( 8.27 ) in MM11 . There was high correlation (0.871) between roundness sorting, area and reiterations soil series. High coefficient of variation of roundness sorting was (0.471), then (0.449) for Circularity four factor, finally of roundness (0.343).