A METHODOLOGICAL STUDY ON CREATING A DIGITAL SOIL MAP FROM A CONVENTIONAL SOIL MAP VIA GIS WITHOUT FIELDWORK ON A STAGE FARM IN THE EASTERN ANATOLIA REGION OF TURKEY


DİNGİL M. , Oztekin M. E. , ŞENOL S.

FRESENIUS ENVIRONMENTAL BULLETIN, cilt.23, ss.2501-2508, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 23 Konu: 10
  • Basım Tarihi: 2014
  • Dergi Adı: FRESENIUS ENVIRONMENTAL BULLETIN
  • Sayfa Sayıları: ss.2501-2508

Özet

Conventional Soil Maps (CSM), used as the major data source for information on the spatial variation of soil, are limited in terms of both the level of spatial detail, and the accuracy of soil attributes. These soil maps however, contain valuable information on soil environment relationships. If people do not use the information regarding the soils and field data, then this useful information can be lost. In fact, such knowledge can be evaluated by updating conventional soil maps through the use of available high-quality data on environmental variables and data analysis techniques. A version of the Geographic Information System (GIS) was used to update conventional soil maps without additional fieldwork. The proposed method in this research is an effective one in order to update conventional soil maps, and our findings present the benefits of GIS in both agricultural area and environmental management. Updated maps are thus more accurate and useful than using CSM. In addition, both detailed information on the soils and field can be extracted from CSM, such as, the soil texture and soil slope maps, etc. In this study, seven different maps were produced from updating the CSM of the study area via the GIS technique essentially the sub-surface drainage, the surface drainage, the soil slope, the surface soil texture, the physiographic unit, the Land Capability Class (LCC), and the Taxonomic unit maps. The obtained results were about distribution of the soils and land characteristics after being updated of the CSM in the study area. Slope classes are A, Ar, A-Ar and Ar-B. The distribution of the slope classes in the study area were 42, 34, 2 and 9%, respectively. There were two rated groups of surface soil texture; 2% (CL, SCL, SiCL) and 85% (C, SiC, SC). We determined two classes of subsurface drainage which were "well" and "poor", and the proportions were 73% and 14%. respectively. Base land (0.7%), river bank (0.3%) and terrace (86%) were the physiographic units of the stage farm. The fields used in the study area were arable lands, which were II. and III. classes according to the LCC and their distributions were 5 and 82%, respectively. Finally, Chromic Haploxerert (19%), Typic Haploxerert (67%), Typic Calcixerert (0,7%) and Vertic Haploxeroll (0,3%) were identified according to the Soil Taxonomy.