... Imteaz, Monzur A 1 ; Hassan, Kazi I 2. Abstract: Due to the construction and associated river... more ... Imteaz, Monzur A 1 ; Hassan, Kazi I 2. Abstract: Due to the construction and associated riverbank protection works of Jamuna Multipurpose Bridge on Jamuna River at Bangladesh, water flow through the Old Dhaleswari River was reduced significantly. ...
ABSTRACT This research evaluates which is the most cost-efficient rainwater harvesting (RWH) syst... more ABSTRACT This research evaluates which is the most cost-efficient rainwater harvesting (RWH) system in a new commercial building located in the north of Portugal, in Braga. Based on the economic analysis, the cost-efficiency of the presented RWH strategies may be considered for the case studied. The results of this research indicate that RWH scenarios proposed are cost-efficient. Considering a 10 % discount rate, the water price charge in the municipally of Braga and the cost of the infrastructures would be enough to make RWH cost-efficient for this option. At this discount rate, the payback period ranges from 2 to 6 years and the internal rate of return would range from 23 to 76 %. If a discount rate of 5 % were considered, the payback periods would be reduced by approximately 1 year.
... Imteaz, Monzur A 1 ; Hassan, Kazi I 2. Abstract: Due to the construction and associated river... more ... Imteaz, Monzur A 1 ; Hassan, Kazi I 2. Abstract: Due to the construction and associated riverbank protection works of Jamuna Multipurpose Bridge on Jamuna River at Bangladesh, water flow through the Old Dhaleswari River was reduced significantly. ...
ABSTRACT This research evaluates which is the most cost-efficient rainwater harvesting (RWH) syst... more ABSTRACT This research evaluates which is the most cost-efficient rainwater harvesting (RWH) system in a new commercial building located in the north of Portugal, in Braga. Based on the economic analysis, the cost-efficiency of the presented RWH strategies may be considered for the case studied. The results of this research indicate that RWH scenarios proposed are cost-efficient. Considering a 10 % discount rate, the water price charge in the municipally of Braga and the cost of the infrastructures would be enough to make RWH cost-efficient for this option. At this discount rate, the payback period ranges from 2 to 6 years and the internal rate of return would range from 23 to 76 %. If a discount rate of 5 % were considered, the payback periods would be reduced by approximately 1 year.
In order to understand the hydrodynamics of a river basin, it is essential to evaluate its discha... more In order to understand the hydrodynamics of a river basin, it is essential to evaluate its discharge capacity. It is a challenge though, particularly for an ungauged basin, as the discharge frequently changes due to geometric and climate features. Hydraulic models, calibrated with reliable measured data, are efficient tools to assess river basin flow characteristics. In the study, HEC-RAS was used to model water levels in three cross-sections of the Juqueriquere river basin, located in the northern coastline of Sao Paulo State, Brazil. The Manning's roughness coefficients for these locations were adjusted to fit with the measured data and corresponded to the bed, left & right banks of Camburu, Claro and Areeiro gauging stations. These coefficients were compared with the earlier estimated n-values, which were based on a theoretical approach and field campaigns. The absolute deviation and Mean Absolute Deviation (MAD) values between the estimated and calibrated Manning's n-values were calculated for each cross-section. It was found that, for some cases, calibrated n-values did not match with the theoretical estimations. The reasons for these discrepancies are discussed in this paper.
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