An appropriate formula of rainfall data is the Intensity Duration Frequency (IDF) relationship. The rainfall IDF relationship is one of the tools used considerably in water resources engineering, either in planning, designing and operating projects of water resources, or in flood control projects. The purpose of this paper is to update rainfall IDF curves of Baghdad city developed in previously. The frequency analysis of available rainfall data is perform by three statistical methods, namely, the Gumbel Distribution Theory, the Log Pearson Type III and Log Normal Distribution to attain rainfall intensities for various short durations (0.25, 0.5, 1, 2, 3, 6, 12 and 24) in hours and return periods (2, 5, 10, 25, 50 and 100) in years. IDF equation was derived based on Bernard equation and the results of three distributions were compared using Kolmogorov-Smirnov goodness of fit test with help of the Easy fit software 5.6. The results of three methods were close and accepted at 10% significant level. The maximum rainfall intensity of 118.052mm/hr was happened at the duration 0.25hr of the return period 100yr, whereas the minimum rainfall intensity of 1.257mm/hr was happened at the duration 24hr of the return period 2yr.
Since, hyperelastic materials, such rubber, are widely used in different life fields principally in engineering of elastomeric bearing pads. The present study aims to determine a suitable constitutive model dependent on strain energy potential which can characterize hyperelastic material behavior through uniaxial tension test only. Built-in ABAQUS software constitutive hyperelastic models are used to fit the experimental results of the uniaxial tension test, check the stability and obtain the material coefficients. The used models are that of Mooney-Rivlin, Polynomial, Neo-Hookean, Yeoh and Ogden. The results revealed that Polynomial, Ogden and then Yeoh models are convenient to fit the hyperelastic behavior of the rubber material while Mooney-Rivlin and Neo-Hookean models have a slight ability of fitting limited to the early stage of the linear behavior of the material.
Baghdad city suffers from random urbanized expansion and highly congested roads. The city environment has been badly affected by its air pollution and low green coverage. Through this paper, a Multi Land Use (MLU) approach is presented to provide areas for commercial and domestic purposes without needing to consume more green coverage of the city and also transform the neighbour land use to one place and change them to green areas. According to the results of this research, it was found that the bus terminals is the best choice for MLU and there are many places in Baghdad available to be MLU. Towards this, satellite images and CAD software have been used to find these terminal places and areas saving possibility. This is done by transforming neighbour land uses to be MLU in one place. These terminals were classified according to their areas into small (less than 10,000 m2), medium (between 10,000 to 40,000 m2) and big (more than 40,000 m2). For terminals of small and medium areas, shopping centres and hotels can be constructed over them, while for the big terminals, student accommodations and flats for domestic purposes can also be built over these terminals, in addition to shopping centres and hotels. As a case study for this research, the Bab Al-Muatham bus terminal was illustrated. The results showed that this bus terminal can be changed to be MLU and can save an area of more than 50,000 m2 through transforming the surrounding land uses to be MLU and change the transformed lands to be green areas.
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