Browsing by Subject "urban runoff"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
Item Analysis of stormwater runoff from impervious surfaces in downtown Minneapolis, MN(2021-09) Faust, BrittanyUrban stormwater runoff is a major concern for water quality. Impervious surfaces, especially in urban environments, can allow contaminated stormwater direct access to receiving waterbodies. Impervious surfaces make up nearly 90% of land cover in downtown Minneapolis, Minnesota. When rain falls or snow melts, pollutants quickly transfer from those surfaces into nearby waterways. A study of stormwater runoff from impervious surfaces in downtown Minneapolis, Minnesota USA was conducted to understand potential impacts of different types of impervious surfaces (i.e., streets, sidewalks, parking lots and rooftops). The results of this study could be used to inform urban stormwater management strategies, particularly when the makeup of the area is mostly impervious surfaces. Between summer 2017 and spring 2018, a rainfall simulator was used to deliver water upon street, sidewalk, and parking lot sites, which removed differences in rainfall characteristics, and tested the role of varying surface types and seasonal differences. Characteristics of rooftop runoff were studied using natural rainfall and snowmelt event data collected year-round with automated samplers and rain gauges. Results showed that the first flush of runoff contained higher pollutant concentrations compared to the whole rain event, and water quality differences for all of the surfaces were relatively minor for the summer and fall seasons. The greatest difference was observed with higher pollutant concentrations occurring in the spring for all sites, particularly on streets. Higher than expected concentrations of chloride in the winter occurred from roofs, though concentrations were overall much smaller than the ground sites in the spring. Street event mean concentrations (EMCs) were the highest across different stormwater constituents, including chloride, total phosphorus, and total suspended solids. For each stormwater constituent, when the average EMC value was used for calculating pollutant loading instead of individual surface type EMC values, street contributions were underestimated, and the other surface types were overestimated due to the higher pollutant concentrations from streets than other impervious surfaces.Item Proceedings of Conference on Inland Lake Renewal and Shoreland Management(Water Resources Research Center, University of Minnesota, 1972-06) Water Resources Research CenterThe program of the Conference included an introduction and overview of the program of the Inland Lake Demonstration and Shoreland Management Project of Wisconsin. Reports were presented on selected lake renewal activities, selected shoreland management and development activities, and shoreland management educational programs. Projects were described involving chemical inactivation of nutrients, nutrient exclusion/dilutional pumping, rehabilitation of a small flowage, urban runoff, characterization private controls for recreational land development, shoreland development, and lake rehabilitation legislation and programs. The progress of Minnesota's shoreland program and activities in lake demonstration projects was described. Alum was used successfully for chemical inactivation of nutrients in an overfertilized small lake in Wisconsin. Dilutional pumping resulted in some success in reducing the phosphorus content of another lake. Plastic sheeting, in combination with sand and gravel blankets on the bed of a millpond, was used to control aquatic plants. With regard to water-oriented recreational developments, it was suggested that an automatic property owners association can provide a mechanism for maintaining and managing the common open space and facilities to which individual lake lot owners have common rights. A nationwide survey disclosed that explicit statutes saying that a local unit of government or State agency is authorized to project, manage, or rehabilitate lakes are rare. The 1969 session of the Minnesota Legislature passed the Shoreland Management Act requiring each county to adopt a shoreland management ordinance to help combat lake problems. Considerable progress has been made in implementing the provisions of the Act.Item Proceedsings of Conference on Inland Lake Renewal and Shoreland Management(Water Resources Research Center, University of Minnesota, 1972-06) Water Resources Research CenterThe program of the Conference included an introduction and overview of the program of the Inland Lake Demonstration and Shoreland Management Project of Wisconsin. Reports were presented on selected lake renewal activities, selected shoreland management and development activities, and shoreland management educational programs. Projects were described involving chemical and inactivation of nutrients, nutrient exclusion/diluational pumping, rehabilitation of a small flowage, urban runoff, characterization private controls for recreational and development, shoreland development, and lake rehabilitation legislation and programs. The progress of Minnesota’s shoreland program and activities in lake demonstration projects was described. Alum was used successfully for chemical inactivation of nutrients in an overfertilized small lake in Wisconsin. Dilutional pumping resulted in more success in reducing the phosphorus content of another lake. Plastic sheeting, in combination with sand and gravel blankets on the bed of a millpond, was used to control aquatic plants. With regard to water-oriented recreational developments, it was suggested that an automatic property owners association can provide a mechanism for maintaining and managing the common open space and facilities to which individual lake lot owners have common rights. A nationwide survey disclosed that explicit statutes saying that a local unit of government or State agency is authorized to project, manage, or rehabilitate lakes are rare. The 1969 session of the Minnesota Legislature passed the Shoreland Management Act requiring each county to adopt a shoreland management ordinance to help combat lake problems. Considerable progress has been made in implementing the provisions of the Act.