Spatial Modeling of Geomorphic Risks the Stream of Diyala River Between Baqubah and Mouth of River for the Period (1985-2016)

Abstract

This study dealt with Spatial Modeling System of Diyala River between Baqubah and Mouth of the River through passing area of study. The area of study lies in an unstable pavement in the North-East of sedimentary lowland within the limit of secondary Tigris River. The area includes a tectonic activity under the surface which works to make continuous slope which effects the stream of river. The geology of the area is formed of modern river residuals of the fourth age going back to the age of playostosen and Holocene. It is obvious that the area has a superior aspect of being flat and the slope of surface is from North- East till South-West.It appeared that the climate of area is continental climate which is within a regional dry climate having the aspect of high temperature degrees and less fall of rain with oscillation in it elements totally. During the study it appears that the area contains different natural plants growing on the banks of the river and in the middle of the stream. The soil appeared to be transported soil by the Diyala River and hugest part of it is mud of two types; soil of banks of river and soil of flood residuals. There geomorphological risks in the area after designing spatial modeling which by it appeared three levels of land as being suitable or dangerous to use. They are suitable high lands and less dangerous about (15%), suitable and semi dangerous lands about (76.56%), and lower lands and dangerous about (8.44%). These risks have a negative effect on the usage of lands by human activity as being lands very sloppy and unstable and always are effected by different types of erosion processes which makes it unsuitable for any kind of human usage like living, agriculture, roads, and bridges