stormwater utility
... systems and open channels are separate from the sanitary sewer system. The central portion of the city, which encompasses the other one-third, is served by a Combined Sewer System (CSS). The Department of Public Utilities operates and maintains the Combined ...
... systems and open channels are separate from the sanitary sewer system. The central portion of the city, which encompasses the other one-third, is served by a Combined Sewer System (CSS). The Department of Public Utilities operates and maintains the Combined ...
Soil Science Step-by-Step Field Analysis
... the soil, or run off. Infiltration operates as the partitioning “switch” at the soil surface. Infiltration rates that are smaller than the precipitation rate will eventually result in surface ponding of water, leading to the creation of runoff. Surface run-off water is not buffered or filtered by it ...
... the soil, or run off. Infiltration operates as the partitioning “switch” at the soil surface. Infiltration rates that are smaller than the precipitation rate will eventually result in surface ponding of water, leading to the creation of runoff. Surface run-off water is not buffered or filtered by it ...
Reducing inflow to stormwater sewers by the use of
... and William, 2010; Petrucci et al., 2012; Zhang et al., 2012). In particular, the retention performance of domestic rainwater tanks has started to be investigated in order to evaluate the benefits of using such systems as source control method to reduce storm water flows. In this context, some autho ...
... and William, 2010; Petrucci et al., 2012; Zhang et al., 2012). In particular, the retention performance of domestic rainwater tanks has started to be investigated in order to evaluate the benefits of using such systems as source control method to reduce storm water flows. In this context, some autho ...
Quantifying the effects of urban stormwater management – towards
... surfaces or infiltration through trenches or swales. Regarding groundwater quality, the general target is to prevent deterioration (EU 2000; BBodSchV 1999; GrwV 2010). Accordingly, effects will depend on the source water quality (roof runoff, streets, etc.) and the quality of the ambient groundwater ...
... surfaces or infiltration through trenches or swales. Regarding groundwater quality, the general target is to prevent deterioration (EU 2000; BBodSchV 1999; GrwV 2010). Accordingly, effects will depend on the source water quality (roof runoff, streets, etc.) and the quality of the ambient groundwater ...
Models evaluation and selection
... 2. Preparation and coupling of distributed land-use categories to other data and subcatchments, and coupling of point sources to subcatchments using GIS; 3. Import land use to the HBV-model calculations followed by export of hydrology for the SOILNDB and ICECREAM calculations. 4. Import agricultura ...
... 2. Preparation and coupling of distributed land-use categories to other data and subcatchments, and coupling of point sources to subcatchments using GIS; 3. Import land use to the HBV-model calculations followed by export of hydrology for the SOILNDB and ICECREAM calculations. 4. Import agricultura ...
using green infrastructure in karst regions
... and velocity by 60% while filtering out pollutants.6 This pasture and other critical natural areas are able to absorb and filter stormwater in a landscape that is otherwise unable to process and safely infiltrate runoff. Disturbing this area would not only reduce its ability to absorb runoff, it wou ...
... and velocity by 60% while filtering out pollutants.6 This pasture and other critical natural areas are able to absorb and filter stormwater in a landscape that is otherwise unable to process and safely infiltrate runoff. Disturbing this area would not only reduce its ability to absorb runoff, it wou ...
HERE - Baltimore Ecosystem Study
... Since you will be unable to monitor the amount of precipitation that falls at your site for an extended period of time, look for precipitation data recorded close to your school and find the average monthly precipitation for your area. The national weather service (http://www.nws.noaa.gov) and other ...
... Since you will be unable to monitor the amount of precipitation that falls at your site for an extended period of time, look for precipitation data recorded close to your school and find the average monthly precipitation for your area. The national weather service (http://www.nws.noaa.gov) and other ...
Research in crop production and turfgrass has identified grass
... eutrophication (Moss et al., 2005). In fact, they are not always successful. In a recent study, Stier and Kussow (2009) found that neither buffers of fine fescue nor prairie grasses were effective for reducing P loading to surface water on a Wisconsin golf course. Further means appropriate for nutri ...
... eutrophication (Moss et al., 2005). In fact, they are not always successful. In a recent study, Stier and Kussow (2009) found that neither buffers of fine fescue nor prairie grasses were effective for reducing P loading to surface water on a Wisconsin golf course. Further means appropriate for nutri ...
Simulating future trends in urban stormwater quality environmental controls
... considered include surface depression storage and infiltration on pervious surfaces. Runoff from impervious areas occurs when rainfall exceeds the depression storage depth. Runoff from pervious areas occurs when rainfall exceeds the infiltration rate and the depression storage is full. Using the kin ...
... considered include surface depression storage and infiltration on pervious surfaces. Runoff from impervious areas occurs when rainfall exceeds the depression storage depth. Runoff from pervious areas occurs when rainfall exceeds the infiltration rate and the depression storage is full. Using the kin ...
Fabricated Metal Products Industrial Stormwater Pollution Prevention
... water table that is close to the surface can allow pollutants to enter the groundwater system quickly, which does not allow time for pollutant levels to be reduced by the soil. Karst is common in southeastern Minnesota and is largely shaped by the dissolving action of water on limestone. Over time, ...
... water table that is close to the surface can allow pollutants to enter the groundwater system quickly, which does not allow time for pollutant levels to be reduced by the soil. Karst is common in southeastern Minnesota and is largely shaped by the dissolving action of water on limestone. Over time, ...
AEN-106: Reducing Stormwater Pollution
... Stormwater is a concern not just in urban areas (Figure 1) but in suburban and agricultural locations as well. As stormwater runoff flows over the land or impervious surfaces, it picks up and transports trash and debris as well as pollutants such as pathogens, nutrients, sediments, heavy metals, a ...
... Stormwater is a concern not just in urban areas (Figure 1) but in suburban and agricultural locations as well. As stormwater runoff flows over the land or impervious surfaces, it picks up and transports trash and debris as well as pollutants such as pathogens, nutrients, sediments, heavy metals, a ...
Chapter 7. STORM WATER DETENTION
... a 2:1 ratio of length to width between inlet and outlet. Runoff should have to travel the longest distance possible thorough the basin before being discharged. The shallow and narrow end of the basin should be located near the inlet and the deeper and wider end near the outlet. 3. Inlet Design: The ...
... a 2:1 ratio of length to width between inlet and outlet. Runoff should have to travel the longest distance possible thorough the basin before being discharged. The shallow and narrow end of the basin should be located near the inlet and the deeper and wider end near the outlet. 3. Inlet Design: The ...
Ground Water Models
... throughout a system of branches (network) connected in a dendritic or looped pattern by solving the onedimensional equations of continuity and momentum for the river flow. Model Viewer is a computer program that displays the results of three-dimensional ground-water models. Scalar data (such as hydr ...
... throughout a system of branches (network) connected in a dendritic or looped pattern by solving the onedimensional equations of continuity and momentum for the river flow. Model Viewer is a computer program that displays the results of three-dimensional ground-water models. Scalar data (such as hydr ...
Managing Livestock Holding Pens to Protect Groundwater
... 150 horses, contact the TCEQ to determine whether you need a water-quality protection permit. The requirements may differ by county. For example, Bosque, Comanche, Erath, Hamilton, Hopkins, Johnson, Rains, and Wood Counties are more restrictive in the number of livestock permitted on site. Texas w ...
... 150 horses, contact the TCEQ to determine whether you need a water-quality protection permit. The requirements may differ by county. For example, Bosque, Comanche, Erath, Hamilton, Hopkins, Johnson, Rains, and Wood Counties are more restrictive in the number of livestock permitted on site. Texas w ...
Rain Water Harvesting - Soak Up the Rain Pioneer Valley
... store it for non-potable uses such as irrigation and greywater plumbing. In addition to reducing the demand on public water supplies by replacing potable water with rainwater, rainwater harvesting can reduce peak stormwater flows, potentially reducing combined sewer overflows and other pollution ass ...
... store it for non-potable uses such as irrigation and greywater plumbing. In addition to reducing the demand on public water supplies by replacing potable water with rainwater, rainwater harvesting can reduce peak stormwater flows, potentially reducing combined sewer overflows and other pollution ass ...
docx - retain-it Stormwater Management Systems
... by means of vegetation, asphalt or concrete surfaces, and all drainage system components have been constructed and are free of construction debris and sediments; then the storm water management system can be considered in an operational status. Periodic visual inspections will help to identify issue ...
... by means of vegetation, asphalt or concrete surfaces, and all drainage system components have been constructed and are free of construction debris and sediments; then the storm water management system can be considered in an operational status. Periodic visual inspections will help to identify issue ...
Subsurface Drain
... A subsurface drain is a trench or system of trenches containing a perforated pipe surrounded by gravel. It is designed to collect stormwater runoff or groundwater and convey it from undesirable locations to a stable discharge point or hydrologic source control such as an infiltration basin or rain g ...
... A subsurface drain is a trench or system of trenches containing a perforated pipe surrounded by gravel. It is designed to collect stormwater runoff or groundwater and convey it from undesirable locations to a stable discharge point or hydrologic source control such as an infiltration basin or rain g ...
Research advances in nutrient runoff on sloping land in watersheds
... different gradients SLs. Their results also showed that the concentration of potassium ion with runoff increases with increasing SG in an exponential fashion. However, Liu and Li (1995) found that the loss of nutrients increased with SG as a power function is suitable when SG is more than 12◦ , but ...
... different gradients SLs. Their results also showed that the concentration of potassium ion with runoff increases with increasing SG in an exponential fashion. However, Liu and Li (1995) found that the loss of nutrients increased with SG as a power function is suitable when SG is more than 12◦ , but ...
Calliandra contour hedges - Food and Agriculture Organization of
... Affected plants are uprooted and burnt. In addition, calliandra is affected by hot, dry weather. During the hot, dry weather, the hedge barrier becomes weak. However during the wet season it sprouts again, and, if well managed, becomes healthy again. A well-maintained hedge barriers can last well ov ...
... Affected plants are uprooted and burnt. In addition, calliandra is affected by hot, dry weather. During the hot, dry weather, the hedge barrier becomes weak. However during the wet season it sprouts again, and, if well managed, becomes healthy again. A well-maintained hedge barriers can last well ov ...
Stormwater particle characteristics of five different
... sediment mobilization increases significantly with slope (Zingg 1940; Musgrave 1947). On this basis, the relative NCP load contributions given in Table 3 are indicative only. Small-to-Moderate Storms It is becoming recognized that urban runoff from the more frequent storms (generally less than 15 to ...
... sediment mobilization increases significantly with slope (Zingg 1940; Musgrave 1947). On this basis, the relative NCP load contributions given in Table 3 are indicative only. Small-to-Moderate Storms It is becoming recognized that urban runoff from the more frequent storms (generally less than 15 to ...
Runoff Generation Using Soil Moisture and Neural
... Abstract: Rainfall-runoff modeling is an integral part of a hydrologic model such as the Integrated Quantity and Quality Model (IQQM) being developed for the Lombok catchment in Indonesia. The main objective is to develop a tool for efficient water distribution and management. One of the problems en ...
... Abstract: Rainfall-runoff modeling is an integral part of a hydrologic model such as the Integrated Quantity and Quality Model (IQQM) being developed for the Lombok catchment in Indonesia. The main objective is to develop a tool for efficient water distribution and management. One of the problems en ...
Using GIS to Identify Urban Non-point Water Pollution
... groundwater pollution potential with DRASTIC. Journal of Soil and Water Conservation. This paper focused on the use of GIS to assess pollution potential for groundwater in a southeastern region of Delaware. The focus of the study was to create a database that would be able to produce high risk ...
... groundwater pollution potential with DRASTIC. Journal of Soil and Water Conservation. This paper focused on the use of GIS to assess pollution potential for groundwater in a southeastern region of Delaware. The focus of the study was to create a database that would be able to produce high risk ...
Appendix A-1 Water Resources – Quantity A. The Water Cycle
... Management programs which focus on one aspect of the water cycle – for example, managing only for peak rates of stormwater runoff as we have done so often in Radnor and other municipalities, without paying attention to all of the water cycle component impacts – produces all sorts of "surprises" and ...
... Management programs which focus on one aspect of the water cycle – for example, managing only for peak rates of stormwater runoff as we have done so often in Radnor and other municipalities, without paying attention to all of the water cycle component impacts – produces all sorts of "surprises" and ...
Maumee River (lower) Tributaries and Lake Erie Tributaries
... o Reduce nonpoint source runoff (e.g., through controlled drainage and vegetated riparian buffers). Reduce sediments entering streams. o Install grassed waterways and vegetated riparian buffers to slow sheet runoff and filter sediment. o Promote decentralized storm water practices that reduce sedime ...
... o Reduce nonpoint source runoff (e.g., through controlled drainage and vegetated riparian buffers). Reduce sediments entering streams. o Install grassed waterways and vegetated riparian buffers to slow sheet runoff and filter sediment. o Promote decentralized storm water practices that reduce sedime ...
Storm Water Management Model
The United States Environmental Protection Agency (EPA) Storm Water Management Model (SWMM) is a dynamic rainfall–runoff–subsurface runoff simulation model used for single-event to long-term (continuous) simulation of the surface/subsurface hydrology quantity and quality from primarily urban/suburban areas. The hydrology component of SWMM operates on a collection of subcatchment areas divided into impervious and pervious areas with and without depression storage to predict runoff and pollutant loads from precipitation, evaporation and infiltration losses from each of the subcatchment. In addition low impact development (LID) and best management practice areas on the subcatchment can be modeled to reduce the impervious and pervious runoff. The routing or hydraulics section of SWMM transports this water and possible associated water quality constituents through a system of closed pipes, open channels, storage/treatment devices, ponds, storages, pumps, orifices, weirs, outlets, outfalls and other regulators. SWMM tracks the quantity and quality of the flow generated within each subcatchment, and the flow rate, flow depth, and quality of water in each pipe and channel during a simulation period composed of multiple fixed or variable time steps. The water quality constituents such as water quality constituents can be simulated from buildup on the subcatchments through washoff to a hydraulic network with optional first order decay and linked pollutant removal, best management practice and low-impact development (LID) removal and treatment can be simulated at selected storage nodes. SWMM is one of the hydrology transport models which the EPA and other agencies have applied widely throughout North America and through consultants and universities throughout the world. The latest update notes and new features can be found on the EPA website in the download section.