Abstract Urbanization strongly changes natural catchment by increasing impervious coverage and creating a need for efficient drainage systems. Such land cover lead to more rapid hydrological response storms change distribution of peak low flows. This study aims explore assess how gradual occur during urban development from rural area medium‐density residential catchment. The Stormwater Management Model (SWMM) is utilized simulate series scenarios in same developing Sub‐hourly...

Abstract This study explored the hydrological impacts of urbanization, rainfall pattern and magnitude in a developing catchment. The Stormwater Management Model was parameterized, calibrated validated three development phases, which had same catchment area (12.3 ha) but different land use intensities. model calibration validation by using sub‐hourly hydro‐meteorological data demonstrated good performance predicting stormwater runoff phases. Based on results, threshold between minor major...

Abstract The impacts of land use intensity, here defined as the degree imperviousness, on stormwater volumes, runoff rates and their temporal occurrence were studied at three urban catchments in a cold region southern Finland. with ‘High’ ‘Intermediate’ located around city centre, characterized by 89% 62% impervious surfaces, respectively. ‘Low’ catchment was situated residential area 19% imperviousness. During 2‐year study period divergent weather conditions, generation correlated...

This study quantifies the effects of common stormwater management techniques on urban runoff generation. Simulated flow rates for different low impact development (LID) scenarios were compared with observed during construction phases in a catchment (12.3 ha) that was developed from natural forest to residential area over monitoring period 5 years. The Storm Water Management Model (SWMM) calibrated and validated against fully conditions, it then applied parameterize LID measures produce their...

Flood assessment in urban catchments is usually addressed through the combination of geographic information systems (GISs) and stormwater models. However, coupled use these tools involves a level detail terms hydrological modeling that can be beyond scope overall flood management planning strategies. This research consists development methodology based on multiple regression analysis (MRA) to assess risk according their morphologic characteristics geometrical topological arrangement drainage...

Urban hydrology is characterized by increased runoff and various pollutant sources. We studied the spatio-temporal patterns of stormwater metal (Al, V, Cr, Mn, Fe, Cu, Zn, Pb) concentrations loads in five urbanized one rural catchment Southern Finland. The two-year continuous monitoring revealed a non-linear seasonal relationship between urban intensity export. For runoff, variation decreased with increasing imperviousness. most catchments experienced greatest temporal concentrations: annual...

Permeable Pavement Systems (PPS) are an alternative to conventional paving systems that allow water filter through their layers instead of running off them. They structural source control Sustainable Drainage System (SuDS), which can contribute reducing increased flood risk due the combination two greatest challenges with cities will have deal in future: urbanization and Climate Change. Hence, this research consisted design a site selection methodology for location prioritization PPS urban...

Urbanization modifies the natural water cycle particularly by reducing storage capacity. We analysed capacity of three stormwater management designs in south-western Finland to demonstrate how an urban catchment releases and contributes flood resilience. The analysis relies on EPA SWMM5.1 simulations balance for a seven-month period including two extreme rain events during summer autumn. enhanced provided increased resilience against flooding released with slower rates leading reduced peak...

Abstract Multiple natural and anthropogenic factors affect urban water chemistry. However, little is known about the abundance or temporal variation of major ions in runoff. This study explores spatio‐temporal dissolved (Na, K, Ca, Mg, Cl, NO 3 , SO 4 ) total solids (TDS) cold climate stormwater. Three watersheds with varying degrees land use intensity imperviousness (from 36% to 66%) Helsinki, Finland, were continuously monitored for 5 years using an automated sampling procedure obtain...

Accurate quantification of the amount, quality and sources urban stormwater runoff are a prerequisite for effective management. The goal this study was to estimate city-scale pollutant export, examine effect data on export estimates, develop an optimization method monitoring. results were presented city Lahti in southern Finland, where site mean concentrations (SMCs), annual loads, monitoring guidelines specific land use types determined total suspended solids (TSS), nutrients (total...

Despite the crucial role of snow in hydrological cycle cold climate conditions, monitoring studies urban quality often lack discussions about relevance catchment-scale runoff management. In this study, measurements were conducted at two residential catchments Espoo, Finland, simultaneously with continuous measurements. The results used to produce estimates areal mass loads (SML). Based on results, urbanization reduced water equivalent but increased pollutant accumulation snow: SMLs a...

Research on the water quality of urban runoff has so far focussed post-development phase catchments, whereas in developing areas under construction remained less understood. The phase, however, may constitute a considerable source diffuse pollution areas. This study investigated mechanisms affecting residential during and post-construction phases. Water (suspended solids, total phosphorus, nitrogen chemical oxygen demand) were monitored over period 5 years three catchments located city Espoo...

Constructing hydrological models for large urban areas is time consuming and laborious due to the requirements high-resolution data fine model detail. An open-source algorithm using adaptive subcatchments proposed automate Storm Water Management Model (SWMM) construction. The merges with homogeneous land cover a common outlet into larger subcatchments, while retaining small-scale details where or topography more heterogeneous. method was tested on an 85-ha catchment in Helsinki, Finland. A...

Nature-based solutions and similar natural water retention measures to manage urban runoff are often implemented by cities in order reduce peaks, catch pollutants, improve sustainability. However, the performance of these stormwater management is relatively rarely assessed detail prior their construction, or monitored evaluated following implementation. The objective this study was investigate field-scale road filters with respect quantity quality. This synthesizes data from two intensive...