Analyzing the Impact of Impervious Area Disconnection on Urban Runoff Control Using an Analytical Probabilistic Model

2019 ◽  
Vol 33 (5) ◽  
pp. 1753-1768 ◽  
Author(s):  
Jun Wang ◽  
Shouhong Zhang ◽  
Yiping Guo
Keyword(s):  
Probabilistic Model ◽  
Urban Runoff ◽  
Impervious Area ◽  
Runoff Control ◽  
The Impact ◽  
Analytical Probabilistic Model

Statistical Water Quality Modelling for Urban Runoff Control Planning

1994 ◽  
Vol 29 (1-2) ◽  
pp. 181-190 ◽  
Author(s):  
J. Y. Li ◽  
B. J. Adams
Keyword(s):  
Water Quality ◽  
Quality Control ◽  
Probabilistic Models ◽  
Cost Optimization ◽  
Urban Runoff ◽  
Storage Treatment ◽  
Runoff Control ◽  
The Cost ◽  
Rainfall Statistics ◽  
The Impact

Increased concern for the impact of urban runoff on receiving water quality makes acute the need to develop runoff quality control models for the various stages of urban runoff control planning. Analytical probabilistic models, which compare favourably with the STORM simulation model, have been derived to predict the long-term pollution control performance of storage-treatment systems from rainfall statistics. With knowledge of the cost functions of storage-treatment systems, the developed cost optimization precedure can be used to determine the least-cost combination of storage and treatment systems which can achieve various levels of quality control. This information is useful for specification of design performance and subsequent design level analyses of control systems.

Large-Scale Application of Biofiltration Swale Runoff Management Practices

2007 ◽  
Vol 2 (2) ◽  
Author(s):  
William C. Lucas
Keyword(s):  
Large Scale ◽  
Management Practices ◽  
Peak Flow ◽  
Low Impact Development ◽  
Urban Runoff ◽  
Management Model ◽  
Check Dams ◽  
Runoff Reduction ◽  
Impervious Area ◽  
Hydrologic Responses

Retaining rainfall where it lands is a fundamental benefit of Low Impact Development (LID). The Delaware Urban Runoff Management Model (DURMM) was developed to address the benefits of LID design. DURMM explicitly addresses the benefits of impervious area disconnection as well as swale flow routing that responds to flow retardance changes. Biofiltration swales are an effective LID BMP for treating urban runoff. By adding check dams, the detention storage provided can also reduce peak rates. This presentation explores how the DURMM runoff reduction approach can be integrated with detention routing procedures to project runoff volume and peak flow reductions provided by BMP facilities. This approach has been applied to a 1,200 unit project on 360 hectares located in Delaware, USA. Over 5 km of biofiltration swales have been designed, many of which have stone check dams placed every 30 to 35 meters to provide detention storage. The engineering involved in the design of such facilities uses hydrologic modeling based upon TR-20 routines, as adapted by the DURMM model. The hydraulic approach includes routing of flows through the check dams. This presentation summarizes the hydrological network, presents the hydrologic responses, along with selected hydrographs to demonstrate the potential of design approach.

A probabilistic model for the vulnerability of metal plates under the impact of cylindrical projectiles

2007 ◽  
Vol 20 (2) ◽  
pp. 128-134 ◽  
Author(s):  
A. Mebarki ◽  
Q.B. Nguyen ◽  
F. Mercier ◽  
R. Ami Saada ◽  
F. Meftah ◽  
...  
Keyword(s):  
Probabilistic Model ◽  
Metal Plates ◽  
The Impact

scholarly journals Structural Integrity Evaluation of Jackets Submitted to Through Cracks

2002 ◽  
Author(s):  
Antoine Rouhan ◽  
Franck Schoefs
Keyword(s):  
Finite Element ◽  
Probabilistic Model ◽  
Structural Integrity ◽  
Detection Theory ◽  
False Alarms ◽  
Structural Behaviour ◽  
Maintenance Costs ◽  
The Impact

The study of the impact of through cracks on structural integrity of jacket platforms still a challenge. The detection of such cracks is of great importance and a miss, or a spurious indication can lead to maintenance costs overrun. In the context of risk-based inspection and monitoring of such structures, a global methodology is proposed. The detection of large cracks is first addressed. A probabilistic model is proposed, taking into account the in situ inspections performances and the probability of crack presence. This is achieved by the use of the detection theory. Second, a finite element that is able to represent the structural behaviour of through cracked tubular nodes is proposed and a global structural integrity measure is suggested. Finally, inspection results are introduced in order to compute the expected platform structural integrity. It is illustrated by considering FMD inspections results of a tripod structure. Effects of false alarms can then be underlined.

scholarly journals A Railway Scheduling Method using Probabilistic Model Checking

2019 ◽  
Vol 9 (1) ◽  
pp. 6694-6698
Keyword(s):  
Model Checking ◽  
Probabilistic Model ◽  
Probabilistic Model Checking ◽  
Railway Transportation ◽  
Railway Network ◽  
Double Line ◽  
Arrival Times ◽  
Scheduling Method ◽  
Prism Model ◽  
The Impact

Trains scheduling is an important problem in railway transportation. Many companies use fixed train timetabling to handle this problem. Train delays can affect the pre-defined timetables and postpone destination arrival times. Besides, delay propagation may affect other trains and degrade the performance of a railway network. An optimal timetable minimizes the total propagated delays in a network. In this paper, we propose a new approach to compute the expected propagated delays in a railway network. As the main contribution of the work, we use Discrete-time Markov chains to model a railway network with a fixed timetable and use probabilistic model checking to approximate the expected delays and the probability of reaching destinations with a desired delay. We use PRISM model checker to apply our approach for analyzing the impact of different train scheduling in double line tracks.

Impacts of the climate change on runoff and diffuse phosphorus load to Lake Balaton (Hungary)

2009 ◽  
Vol 59 (3) ◽  
pp. 417-423 ◽  
Author(s):  
Á. Kovács ◽  
A. Clement
Keyword(s):  
Climate Change ◽  
Hydrological Cycle ◽  
Empirical Relationship ◽  
Urban Runoff ◽  
Weather Data ◽  
Phosphorus Concentration ◽  
Climate Change Scenarios ◽  
Lake Balaton ◽  
Phosphorus Load ◽  
The Impact

The paper outlines a multi-component assessment of the impacts of the climate change on runoff and total phosphorus loads to the large shallow Lake Balaton in Hungary. Present hydrological cycle of the lake catchment has been examined using the rainfall-runoff model WetSpa. Particular phosphorus concentration in runoff was estimated on the basis of the simulated streamflow using an empirical power equation. Dissolved phosphorus concentrations were determined as a function of landuse and soil type of the corresponding sub-catchment. The model was calibrated and validated against daily observations manually at monitoring sites of sixteen inflowing streams around the lake. Runoff stemming from shoreline urban developments was calculated by the urban runoff simulation model SWMM. Phosphorus concentrations in urban runoff were calculated by an empirical relationship derived from field measurements. The model was henceforward run for climate change scenario analysis. Present weather data were modified by the climate change scenarios imported from the results of the CLIME project. The results indicate that the impact of the climate change on runoff and phosphorus load appears in the change of the distribution within a time period rather than in the total volume. However, due to the high uncertainties in climate models, the presented calculations are possible assumptions rather than established statements.

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