A new formula for determining the suspended sediment load in Khour Al-Zubair port has been proposed using dimensional analysis. Six cross-sections have been identified in Khour Al-Zubair port at Basrah province, South of Iraq for the purpose of conducting field measurements during the two tidal periods (Neap and Spring). The study involved taking field measurements of the hydraulic and fluid properties, and sediment sampling by section every 2 h to get effective parameters used for developing empirical formula. These parameters include the density of sediment (ρ s), mean velocity (V), hydraulic radius (R h), fall velocity of the particle (W s), median grain size (d 50), the salinity of water (S), water level (W L), the width of the estuary (B), specific gravity (G s), maximum flow depth (D max), and kinematics viscosity (ν). The formula was developed using the statistical analysis using the SPSS program and dimensional analysis method. A good agreement between the loads computed by the suggested formula and the observed data has been attained based on the correlation coefficient value (R = 0.97). The results showed that the average total suspended sediment loads by using the proposed formula is 1288285.464 tons/year.

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Gutters are used to drain water way off to the Inlet. This process significantly reduces the phenomenon of hydroplaning and thus reduces traffic accidents. The main objective of this study is to evaluate the effect of the characteristics road (manning's coefficient, longitudinal slope, and cross slope) on the capacity of gutter, and spread as well as the change which was clarified for all gutters types. Two simulation models have been developed in this study, which represent the major components of the system. These models are spread Model (SM), Gutter Capacity Model (GCM), and the first model studies spread if rain information is available, while the second model studies a gutter capacity if no rain information is available. The study reached at the conclusion: gutter capacity is inverse proportion with manning’s coefficient and directly proportional with cross slope and longitudinal slope for road. Affect spread is different according to form gutter.

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