A GIS based approach for the mitigation of surface runoff to the shallow lowland reservoir
Jolanta Dąbrowska , Paweł Dąbek , Marcin Wdowikowski
AbstractShallow lowland dam reservoirs situated in agricultural areas are especially prone to eutrophication. For the purpose of protection of such water bodies it is essential to establish not only sources and loads of pollution, but also the routes of nutrients, particularly from a direct catchment to the reservoir. The aim of the undertaken research was to determine surface runoff transport pathways from the direct catchment through shore zone to the waters as well as the influence of land use pattern on the directions and accumulation of the runoff. The research was conducted for the Goluchew Reservoir situated in the lowlands in central-western part of Poland (51°50'37"N, 17°56'09"E). The reservoir was constructed in 1970 by dividing the valley of the Trzemna River with an earth dam. Another smaller tributary is Jedlec Ditch. The catchment area to the dam cross section is 106.8 km2, and mean annual flow is 0.37 m•s-I. At normal water level the reservoir has the capacity of 1.385 min m3 and the area of 51.5 ha. The reclamation which started in 1994 consisted in building a sedimenation pond with reed bed on the river Trzemna, installing spatial structures made of polypropylene in both tributaries, as a frame for microorganisms purifying water, and setting an aeration facility in the vicinity of the dam. On the basis of data from the years 2000-2016, collected from databases of Provincial Environment Protection Inspectorate in Poznan and The Institute of Meteorology and Water Management — National Research Institute, physiographic conditions of the catchment were characterised, as well as the main sources and loads of pollution. With the use of data from Corine Land Cover 2012 provided by Chief Inspectorate Of Environmental Protection, land use pattern of the direct catchment was analysed. On the basis of elevation data from the resources of Central Documentation Centre of Geodesy and Cartography, from the generated digital elevation model with resolution of 0.4 m terrain inclination was established and surface runoff transport pathways designated from the catchment to the reservoir. Sensitive areas for reaching pollution to the reservoir waters were pointed out. The methodology proposed by the authors, based on available spatial data and elaborated in geostatistical GIS tools, may serve to analyse and shape surface runoff transport pathways from a direct catchment to a reservoir, as well as to effectively plan and manage riparian buffer zones.
|Publication size in sheets||0.3|
|Book||International Symposium „Ecohydrology for the Circular Economy and Nature-Based Solutions towards mitigation / adaptation to Climate Change” : book of abstracts, 2017, ISBN 978-83-928245-5-8, 133 p.|
|Keywords in English||buffer zones; eutrophication; agricultural pollution; flow accumulation; GIS; riparian ecotones|
|Publication indicators||= 3|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.