تصرف العوارض الفولاذية ذات لباب مموجة دراسة تأثير تغير المناخ على أداء شبكة مياه الأمطار (دراسة حالة – محافظة البصرة )

Rp-Study the Effect of Climate Change in Performance of Stormwater Networks (Case Study-Basrah Province). pdf

Climate change is expected to have a significant impact in the near, medium and long terms on the globe, especially in the Middle East, lands of this region are semi-desert and due to the growing phenomenon of global warming. Therefore, the aim of this study is to develop adecision-making activity to determine the efficiency of stormwater drainage network specifically in Basra, Iraq. Climatic data were collected from the Directorate of Meteorology and Seismic Monitoring in Iraq(DMSMI) for the period from 1979 to 2018 .
Geographical International System ArcGIS (ArcMap 10.7.1)were utilized to determine the map of the study area and work on it to determine the direction of flow, levels of pipes and manholes.The Statistical Down Scaling Model SDSM were used to predict the rainfall up to end of 21century base on the collected data. Rainfall intensityis expected to reach (14.5, 17.8, 19.5, 21.5) mm/hr for the years 2030, 2056, 2075 and 2099, respectively.
The Storm Water Management Model( SWMM) was also used to obtain flood results at design rainfall intensity of 11.5 mm/hr that 81.8% of manholes without flood, 18.2%overflow,while at rain intensity of 14.5 mm/hr, 75.2% of manholes are without Flood, 24.8% of manholes overflow.The intensity of 17.8 mm/hr 71.9% of the manholes without flood, 27.1% overflow, at intensity of 19.5 mm/hr 66.1% of the manholes without flood, 33.9% overflow, with a intensity of 21.5 mm /hr 64.5% of manholes without flood, and 35.5% overflow.
For further inspection of the stormwater network, two intensities are added that could occur at any time due to climate change. . When the rainfall intensity is 35 mm/hr, 62.8% of manholes are not flooded,and 37.2% are flooded. While 53.7% of the manholes are not flooded, and 46.3% are overflow with rainfall intensity of 49 mm / h.
From the results, it was found that a large percentage of the stormwater drainage network is exposed to flooding, which requires reviewing the design of the exsisting system and making it withstand these large amounts of rain for flood control to prevent damage to the infrastructure to avoid high financial losses