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According to European Directive 2007/60/EC, the Preliminary Flood Risk Assessment for the Greek territories was completed in 2012 and updated in 2019. For each River Basin District, Areas of Potential Significant Flood Risk were identified. Specific recommendations for the financing of Stormwater Management projects that will be developed according to the principles of Sustainable Development, i. e. , Best Management Practices, Green Infrastructure, Low Impact Construction, Urban Natural Water Retention Facilities, and Sustainable Drainage Systems are among the FRMPs' recommendations.
More study has been done on the uncertainty of stormwater amounts as compared to quality modeling. Although the washoff model has been in use for decades, a general lack of research has been on the uncertainty surrounding washoff modelling and how this uncertainty varies between catchments in various climate zones due to differences in rainfall conditions. This report looked at model configuration uncertainty in urban catchment modeling in two climate zones, in addition to learning about model parameter uncertainty. The rainfall, discharge, and water quality data obtained from 11 residential catchments, which included 72 events from temperate catchments and 59 from tropical catchments, was investigated following an exhaustive search and evaluation of data quality. Using the Generalized Likelihood Estimation method, a comparison of uncertainty between the buildup-washoff model and Washoff model findings for particulate, mixed, and dissolved phase water quality parameters was obtained. The uncertainty in model estimation, according to the Higher Average Relative Interval Length estimates for tropical catchments, is higher than temperate catchments. The majority of the models are suitable for the particulate phase and later for the dissolved phase water quality parameters, providing further evidence that the models' features are not universally applicable and that model findings should be understood in light of this difference.
Reliable forecasting of stormwater response following a rainfall event has the ability to save those costs, because it can be used in model predictive control schemes that optimize pump efficiency considerably better than commonly used real-time control schemes. We'll go step by step showing the model's forecasting capabilities.
Despite the fact that shallow water equations or other numerical methods are often used to help with the estimation of distributed water depth and flow velocity of runoff, it still suffers from poor computational performance due to poor convergence. A governing equation in Ordinary Differential Equation simulations is derived from a research equation in the novel approach, based on the two equival equations regarding the calculation of stormwater runoff simulations, according to the authors, the discharge at the boundary of the catchment and the total water storage in the catchment model estimated by the two models should be equal at all times. The DRM can calculate distributed water depth and flow velocity of heavy rainfall-induced stormwater runoff with a low degree of difficulty and a high degree of accuracy and efficiency, according to the findings.
This paper introduces the Target Flow Control scheme, which is a RTC-based strategy that can be used to control system outflows at or below target flows. The TFC method is tested on a portable two-storage system for 750 design rainfall events from a variety of climates, event durations, rainfall intensities, and temporal trends, with 95% of the experiments having less than 10% errors in target flows. The results show the possibility of the TFC strategy as a practical RTC strategy that may increase the safety of existing stormwater conveyance systems by retaining stormwater system outflows at desired target flows, thereby avoiding stormwater infrastructure upgrades due to land use and climate change.
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