The use of low impact development technologies in the attenuation of flood flows in an urban area: Settat city (Morocco) as a case

Ben-Daoud, Abderrahmane; Ben-Daoud, Mohamed; Moroșanu, Gabriela Adina; Rabet, Souad M’

doi:10.1016/j.envc.2021.100403

Cited by 14 publications

(6 citation statements)

References 34 publications

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“…In the comparison of the two cost estimates, better flow results were observed in most cases for the optimistic cost estimate (2-39%) than the pessimistic cost estimate (10-28%) across the 90th to 99th rainfall percentiles. Studies have also assessed the flow reduction of LID scenarios in larger predominantly impervious catchments, where it can reach a flow reduction of 21 to 50% [47,48], although larger LID sizes may be required to treat a higher influx of runoff.…”

Section: Rainfall-runoff Characteristics Of Each Lid Scenariomentioning

confidence: 99%

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Modeling the Hydrologic Performance and Cost-Effectiveness of LID in a Residential Park Area Using a Decentralized Design Approach

Garbanzos

Maniquiz-Redillas

2022

Hydrology

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Low Impact Development (LID) is one of the current research interests toward green infrastructures and urban flood control that have the capability to return developed watersheds to pre-development hydrological conditions, bringing numerous water quantity and quality benefits, while being cheaper than their traditional counterparts. However, there is a current research gap about LIDs within tropical regions. This study aims to evaluate the cost efficiency of LID scenarios in varying surface areas through a cost-effectiveness (C/E) analysis and to assess flow reduction and infiltration improvement of the cost-effective LID scenarios using US EPA Stormwater Management Model (SWMM) in a tropical residential catchment receiving an annual rainfall of 1780.5 mm (70.1″), under a Type 1 Philippine Climate. Results have shown that the Weibull plotting position generated the largest rainfall amounts. A total of 2112 manually simulated LID scenarios were modeled to obtain the cost-effective or optimal LID scenarios, where they can generate a maximum of 38.67% flow reduction and 29.73% peak flow reduction, all observed in the multiple LID scenarios. At high rainfall amounts, the multiple LID scenarios can also peak at a 1113% increase in total infiltration in the given sub-catchments. Determining the target capture goal, applicable LID types, and cost estimations from a pilot project are vital components in the future application of LIDs in these regions.

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Section: Rainfall-runoff Characteristics Of Each Lid Scenariomentioning

confidence: 99%

“…The improvement of the infiltration of the optimal scenarios from the no LID scenario was also explored, given its capability to further increase infiltration rates [48,49]. Figure 9a,b shows the results of infiltration for all scenarios for the optimistic and pessimistic cost estimates, respectively.…”

Section: Infiltration Improvementmentioning

confidence: 99%

Modeling the Hydrologic Performance and Cost-Effectiveness of LID in a Residential Park Area Using a Decentralized Design Approach

Garbanzos

Maniquiz-Redillas

2022

Hydrology

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“…Various studies on rainfall characteristic parameters modeling and analysis such as rain attenuation, rain drop diameter, raindrop size distribution, velocity and depth of fall utilising simulated and measured data have been reported in literature, but particularly at higher frequencies [15][16][17][18][19][20][21][22], Semi-Temperate [31], and Mediterranean [32][33][34]. However, a detailed clear-cut study on raindrop size rainfall distribution analysis and their influence on specific signal attenuation are mixing in typical Tropical climate region where this study is conducted.…”

Section: A Literature Review and Research Motivationmentioning

confidence: 99%

Tropical Rain Intensity Impact on Raindrop Diameter and Specific Signal Attenuation at Microwaves Communication Link

Isabona¹,

Ojochogwu²,

Odesanya³

2023

IJIGSP

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Realistic knowledge of rainfall characteristics and modeling parameters such as size, shape, and drop size distribution is essential in numerous areas of scientific, engineering, industrial and technological applications. Some key application areas include, but not limited to microphysics analysis of precipitation composition phenomenon, weather prediction, signal attenuations forecasting, signal processing, remote sensing, radar meteorology, stormwater management and cloud photo detection. In this contribution, the influence of rain intensity on raindrop diameter and specific attenuation in Lokoja, a typical climate region of Nigeria is investigated and reported. Three different rain rates classes obtained due to heavy rainfall depth, heavy rainfall depth, and heavy rainfall depth have been explored for the raindrop size distribution analysis. The three-parameter lognormal and Weibull models were utilised to estimate the influence of rain rates on the drop sizes and specific rainfall attenuation in the study location. For Lognormal model, the maximum raindrop concentration occurred approximately at diameter of 1 mm before showing downfall performance trends as the drop diameter increases. In the case of Weilbull model, the maximum raindrop concentration occurred at different drop diameter with the three rain rate classes, before showing downfall concentration trends with increasing rain drop diameter values. By means of the two models, the highest raindrops concentration values attained in correspondence with the specific rain attenuation were made by drop diameters not more than 2.5 mm. In terms of rain rate, specific attenuation and frequency connection, the results disclose that attenuation of propagated electromagnetic waves increases at increasing rainfall depth and increasing operating frequency bands. The results also disclose that the specific attenuation is directly proportional to the increase in rain intensity levels in correspondent with the operational frequency. As a case in point, at 4GHz frequency, the attenuation level of about 20 dB/km level is attained for mean, minimum and maximum rain rates of 29.12, 12.23 and 50.22 mm/hr, respectively. But as the frequency increased from 4GHz to 20GHz, the attenuation level almost doubles from 20 to 45dB/km at still same rain rates. The above performance is so, because at higher radio-microwave frequencies, the wavelength of the propagated electromagnetic waves approaches the mean diameter of the raindrop. The results display gradual increase in attenuation levels as the diameter rain drop sizes and intensity increases or become broader. The attenuation grows because the raindrops interfere, distort, absorb and scatter major portion of the microwave energy. However, the gradual trend in the attenuation level increase becomes slower and tending to logarithm stability at larger rain drop values. This may suggest that the attenuation level may come to equilibrium state at higher rain drop diameters. The resultant outcome of this work can assist microwaves comm...

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“…Due to some major propagation impairments in the atmosphere at different frequencies using measurement and simulated data, various attenuation studies have been reported for different regions. These regions comprise the tropical region [14-16,26-32], subtropical region [33][34][35][36][37][38], temperate regions [39,40], semi-temperate region [41], and Medi- Due to some major propagation impairments in the atmosphere at different frequencies using measurement and simulated data, various attenuation studies have been reported for different regions. These regions comprise the tropical region [14][15][16][26][27][28][29][30][31][32], sub-tropical region [33][34][35][36][37][38], temperate regions [39,40], semi-temperate region [41], and Mediterranean region [42][43][44], among others.…”

Section: Introductionmentioning

confidence: 99%

“…These regions comprise the tropical region [14-16,26-32], subtropical region [33][34][35][36][37][38], temperate regions [39,40], semi-temperate region [41], and Medi- Due to some major propagation impairments in the atmosphere at different frequencies using measurement and simulated data, various attenuation studies have been reported for different regions. These regions comprise the tropical region [14][15][16][26][27][28][29][30][31][32], sub-tropical region [33][34][35][36][37][38], temperate regions [39,40], semi-temperate region [41], and Mediterranean region [42][43][44], among others. However, clear, robust attenuation studies are lacking due to significant propagation impairments over the investigated environment, with a tropical wet and dry savanna climate.…”

Section: Introductionmentioning

confidence: 99%

Atmospheric Propagation Modelling for Terrestrial Radio Frequency Communication Links in a Tropical Wet and Dry Savanna Climate

Isabona

Imoize

Ojo³

et al. 2022

Information

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Atmospheric impairment-induced attenuation is the prominent source of signal degradation in radio wave communication channels. The computation-based modeling of radio wave attenuation over the atmosphere is the stepwise application of relevant radio propagation models, data, and procedures to effectively and prognostically estimate the losses of the propagated radio signals that have been induced by atmospheric constituents. This contribution aims to perform a detailed prognostic evaluation of radio wave propagation attenuation due to rain, free space, gases, and cloud over the atmosphere at the ultra-high frequency band. This aim has been achieved by employing relevant empirical atmospheric data and suitable propagation models for robust prognostic modeling using experimental measurements. Additionally, the extrapolative attenuation estimation results and the performance analysis were accomplished by engaging different stepwise propagation models and computation parameters often utilized in Earth–satellite and terrestrial communications. Results indicate that steady attenuation loss levels rise with increasing signal carrier frequency where free space is more dominant. The attenuation levels attained due to rain, cloud, atmospheric gases, and free space are also dependent on droplet depths, sizes, composition, and statistical distribution. While moderate and heavy rain depths achieved 3 dB and 4 dB attenuations, the attenuation due to light rainfall attained a 2.5 dB level. The results also revealed that attenuation intensity levels induced by atmospheric gases and cloud effects are less than that of rain. The prognostic-based empirical attenuation modeling results can provide first-hand information to radio transmission engineers on link budgets concerning various atmospheric impairment effects during radio frequency network design, deployment, and management, essentially at the ultra-high frequency band.

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The use of low impact development technologies in the attenuation of flood flows in an urban area: Settat city (Morocco) as a case

Cited by 14 publications

References 34 publications

Modeling the Hydrologic Performance and Cost-Effectiveness of LID in a Residential Park Area Using a Decentralized Design Approach

Modeling the Hydrologic Performance and Cost-Effectiveness of LID in a Residential Park Area Using a Decentralized Design Approach

Tropical Rain Intensity Impact on Raindrop Diameter and Specific Signal Attenuation at Microwaves Communication Link

Atmospheric Propagation Modelling for Terrestrial Radio Frequency Communication Links in a Tropical Wet and Dry Savanna Climate

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