Storm Water Management - Science topic
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Questions related to Storm Water Management
I feel that, in water resource management activities (specially flood management), most of the developed software tools are not widely or continuously used. The reason may be either the decision makers work independently from project to project or fully /partially automate the required processes unique to the project.
I would like to know your experiences as well as comments on the utilization of the software tools to assist flood management decisions.
I need to do a research project in climate change and storm water management I want to know if there is any software model stated above can I get for free by doing Analysis.
We have taken return period of 2,5,10,25,50,100yr. and my question is to how we can select storm duration for design rainfall using Intensity-duration-frequency (IDF) curves.
How can I design a bioretention system? Do I have to know the infiltration rate if I want to analyze water conservation from bioretention? How can I measure infiltration rate, but not theoritically?
Although determining the origin of sand storms on the Earth as well as possible, But it is difficult for dust storms. Because this storm covers a large surface area and the specific days, and also dust storms do not always originate from sand dunes.
I have read a recent article titled "Characterizing extreme rainfalls and constructing confidence intervals for IDF curves using Scaling-GEV distribution model'.
I am having some difficulties in understanding the procedure to obtain the short duration rainfall from daily rainfall. Among the three proposed methods of obtaining short duration rainfall from daily rainfall, could someone please explain how to calculate the exponent (λβ) without knowing the short duration rainfall intensities.
I was able to calculate X(t) from daily rainfall intensities using the L-moment theorem proposed by Hosking (1990). But I could not calculate X(λt) for short duration rainfall because I don't know how to calculate the exponent (λβ) without knowing the rainfall intensities of short duration rainfall. Could someone please enlighten me in this regard.
I am having difficulties in understanding this statement from the paper "The exponent is computed based on the scaling properties of the NCMs of extreme rainfalls for various durations".
I want to calculate Mean Residence Time of a Residence Time Distribution (RTD) Curve from tracer experiments. I have tried with the integral formula as can be found in the article attached but it seems that I am calculating wrongly every time. It will be most helpful if someone can show me with an example. The data can be taken from the attached excel file.
The best design consideration in design sediment basin.
In unsteady open channel flow of storm water networks of circular section, besides the hydrographs entering in each link resulting from the continuity equation and excluding weirs or control devices, frequently the boundary conditions considered are the energy equation in the manholes and the critical condition or the uniform flow condition in the case of a free fall downstream or manhole without influence from downstream. A possible approach that is sometimes considered in design situation considers each link separately and the condition of steady uniform flow in the downstream end of each link, for each flow rate reached in the extremity in any instant of time. What is (or may be) the magnitude of the differences reached with this approximation with respect to the real conditions, assuming, in any case, an open channel flow as should be considered in a design situation?
Generally we take a 10-15 year return period of rainfall for designing the drainage system. But again there are different standards for different countries. Moreover, it again changes based on the residential area, commercial area and industrialized area.
I would appreciate if any of my fellow researchers could provide me some literature on this.
Are there any guidelines available for such studies under Indian conditions?
We are making a comparison between modelling basin by softwares (SWMM and others) and empirical formulas. In our city, most of engineers made the hydralulics works by empirical formulas. What are the disadvantages doing the work by this way?
I am interested in finding urban runoff water quality studies, preferably using SWMM. I am working with urban runoff data with continuous flow and rainfall data (2-10 min temporal resolution, 10-30 ha catchments) and water quality data of some common pollutants (TSS, TP, TN, COD) from both wet weather and dry weather flow. I'd be happy to find examples about model calibration (either event-based or continuous modelling) using similar kind of water quality data (flow based sampling, often several samples per event). Also good review papers about the topic are warmly welcome!
I am using SWMM 5.0 in order to simulate TSS in stormwater.
I know that water quality routing within conduit assumes that the conduit behaves as a Continuously Stirred Tank Reactor (see CSTR.jpg file).
In reference to the substance involved in the reaction, a perfect and ideal mixing is assumed, and the universal law of material balance is applied (see transport formula.jpg file), where the coefficient K is the rate constant.
I would like to know if it is possible to modify directly K in the above mentioned formula. If yes, how?
I look forward to hearing from you soon.
On a series of several grab samples, of surface in a storm drain or river, (3 x 60ml ) concentrations are observed ranging from <LOD to several thousand ppb. If we make additional or supplementary analyzes the obtained values also vary widely. The average is meaningless and the standard deviation is often above average. What factor may be envisaged to estimate a range of concentrations from an analysis of a grab sample? Are there references or work on the representativeness of a grab sample water?
Do anyone can send me links of free DEM (digital elevation model) images website, to download maps for urban rainfall and stormwater modelling?
With Climate Change, and with MS4 enforcement and regulations, the field of storm water systems and revenue mechanisms to fund it need exploration.
Our interest is in establishing systems that include social equity into the revenue systems of such funding.
I am doing a research on feasibility of storm water management for fire fighting works in school and colleges. I have got the rainfall data but it is in cm per day and mm per three hours. I am struct on how to convert them into mm per hour. Can anyone help me to convert it.
The conventional rational method or its derivate is still very used for dimensioning and calculating separate urban storm water networks. What are the main reasons for the use of the classic formulation to be normally limited to small drainage basins? The conventional method overestimates or underestimates water flow rates? Is it safe or insecure? The water flow rates for the dimensioning and the calculation of the networks should be increased or decreased?
How to come to a conclusion where to fix a outlet for storm water management in urban areas?
I would like to investigate how urban agriculture can contribute to stromwater management and organic waste management at a urban level, but focusing on building-related practices, such as (rooftop farms or facade farms).
Are there relevant examples of cities that integrate building-related agriculture (rooftop farms/facade farms) into green-infrustructures planning? Could I use a casy study method to identify design strategies, implementation criteria and planning instruments? Or should I extend the research to urban land-based practices?
Thank you in advance!
I want to estimate surface runoff over a large city using SWMM model but there is not any runoff data for calibration. There are digital map scaling 1:25000 and rainfall data for nearly rain recorder site.
I want to do some research on the impact of rainfall observation on urban storm water management. To do this a urban hydrological model with high spatial and temporal resolution is required. However, currently I do not have enough data for modeling, and the model calibration process may be quite time consuming. I wonder if there is any already calibrated urban hydrological model that could be openly downloaded, or if anyone would like to share his/her model. Thanks!
I want to analyse the productivity of Rain-Water Harvesting Technologies at household level in semi arid of Tanzania taking a case of Water-Pan Technology.
I am learning SWMM 5.1 and now I need a case study with catchments data and rainfall hourly data.Could you please help me and give me some information about the sources of data to use as case study?
It doesn't matter where is it.
thanks in advanced
I am currently trying to estimate amount of TSS generated by different land uses in urban runoff. What I usually find in literature is a concentration (showing great disparity). I was wondering if the comparaison with what was generated annually was already undertaken by some of you?
A culvert was subjected to varying flow rates in the lab and the corresponding flow depths recorded. I would like to get guidance on the approach to analyzing this data in order to determine the safe operating flow depth and flow rate
Urban Agriculture (UA) can be implemented in various ways. For instance rooftop-based, land based, or in a closed controlled environment. Furthermore different cultivation methods are available (e.g. hydroponics, soilless- or soil-based agriculture). In addition, it can also be distinguished between community based concepts, private lots, or profit-orientated approaches, etc.
Aside from that UA can have a beneficial effect on urban infrastructures (storm water management, utilizing waste water and biomass, heat reduction, etc.).
My research focusses on the assessment of sustainable and resilient aspects of UA mainly from an ecological point of view. I would be grateful, if somebody could give me some recommendations how I can assess these values in order to provide a selection matrix as a tool for urban planners to incorporate UA in different urban structure types. Any recommendation is welcome ;)
I know a group that is trying to get credit for planting native woody species in storm water management features because logically this should remove more nutrients but they need a study to provide evidence in order to get TMDL credit. Please let me know if there are any studies they can cite. Thanks!
I am interested in estimating runoff reduction by using bioretention and / or rainwater harvesting techniques in urban area using arc CN method. If anyone has information @ this topic, pl share that with me. Thanks very much.
the local 95% trigger value for marine ecosystem health is 1.3 mcg/l
I have done research and apparently both C18 and HLB have good recoveries concerning phthalates.
Has any of the RG colleagues already used any of these two cartridges for phthalates concentration in stormwater samples?
Water supply, sewage, and storm water.
How can I calculate the losses of (EVT & Infiltration) as a percentage of the water storage using rainwater harvesting techniques?
I am preparing a paper for the IPWEA 2014 conference on potential advantages of embracing Ecological Engineering for creating sustainable ecosystems by integrating human societies with the environment for the benefit of both. I am searching for success stories and any new finding highlighting advantages of embracing /applying ecological engineering principles and achieving positive common (human and environmental) out comes.
Appreciate if any examples pilot or major project outcomes published or not I could site as examples.
I am working on a paper in which I study a watershed with a stormwater BMP located in the headwaters and another watershed with a BMP located in the lowlands and a reviewer would like me to discuss the typical distribution of BMPs (whether they are typically in the headwaters draining storm drains or if the are typically lower down in the watershed). Thanks for any help!
I am trying to determine retention time of a proposed constructed wetland to reduce storm water in Jakarta, Indonesia.
In many urban areas rivers have been incorporated into stormwater and sewage systems. That raises a question if we can still claim they are heavily modified and artificial water bodies, therefore should be managed towards good ecological potential. In many cases the answer determines who is responsible for management of such a 'river' and also if there is any chance for initiation of rehabilitation actions.