Evaluation of the Impact Rains and Floods on Drainage System of Asphalt Pavement of Roads Case Study of Upper Atbara and Setit Dam Complex Project

Abstract

The objective of this study was to investigate the Evaluation the impact of rain and storm to asphalt pavement drainage system on the asphalt pavement of road segment in Upper Atbara and Setit Dam Complex Township. In Upper Atbara and Setit Dam Complex Township drainage system are not properly functioning because the area of project are very expansive soil they are many grasses defect the drainage system. The data are photographs that show the current drainage system conditions, site visit, field survey and questionnaires that are gathered from the engineer, residences and road users about the presentation of the drainage systems during the rainy season. The important data for this research are land cover map, topographical map, geological map, and published and unpublished material. The design peak discharge calculated and the review peak discharge calculated of the return period is not equal. From this the road around this is damaged by over flooding of the water on the road because the calculated peak discharge for the design was less than the calculated peak discharge. Therefore before the culverts are constructing the design and the review data must be checked always when its design the road it must be the design peak discharge is greater than the review peak discharge to control the floods that over follow on the road.