Paper presents theoretical background of „Programme of water retention increase in Mazowieckie Voivodship”. Special attention was paid on area evaluation and proposal of investments order. Evaluation of the voivodship area was focused on classification of regions, where increase of water retention is of high priority, average priority or Iow priority. Order of investments (construction or modernization) was based on evaluation results, but included additionally other factors as water ąuality, presence of protected areas, streams continuity maintaining, etc. Paper includes also guidelines for program implementation. ...
In order to improve the quality of retentioned waters in dam reservoirs, the pre-dam reservoirs are built, that are localized above the main one. They aim at keeping contaminants transported by a river. The example of such solution can be the largest reservoir in Lublin region - "Nielisz". Reservoir consists of two parts divided with dam. The main reservoir (water surface area 709 ha at NPP, mean depth 2.8 m, and total capacity 18.30 mln m3) is localized in river Wieprz valley. Its catchment area is 1236.2 km2. The pre-dam reservoir of 179 ha area at NPP, mean depth of 0.7 m, and total capacity of 1.18 mln m3, is situated in river Por valley. The damming section is situated on 1.685 km of its course, while the catchment area amounts to 590.3 km2.Present research aims at presenting the analysis upon the influence of pre-dam reservoir on quality of waters supplying the main reservoir. Water samples were collected with quarter increments at the inflow and outflow from the reservoir. Analysis of results from here conducted survey univocally indicates that analyzed pre-dam reservoir contributes to significant improvement of water flowing into the main one. The largest reduction of pollutant concentrations in ...
Poland is considered to have scarce water resources and to be one of the few countries in Europe which are in danger of a water deficit. Surface water resources in the Lubelskie Province are significantly lower than the country's average and are among the lowest in Poland. This calls for sustainable and sparing water-resources management, combined witch particularly intensive protection of their quality and quantity. The most successful and effective way of forming water resources is surface-water retention aimed at mitigating the water deficit, especially in periods of drought. Catering for the continuously-growing food demand is a primary objective for agriculture in Poland and in the Lubelskie Province (good types of soil). The drainage infrastructure and hydro-engineering buildings are the key factors in increasing the efficiency of production. It allows the sustainable use of water circulation in an environment shaped by man for agricultural purposes. The article includes the condition, selected examples of, and the requirements for, the hydro-engineering buildings to be used in drainage systems for sustainable water management in agriculture.
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One of the main problems of urbanization is the continuous growth of sealed surfaces. Impermeable surfaces i.e. roofs, roads or pavements have dominated land cover, increasing surface runoff and limiting groundwater runoff, often contributing to increased flood risk. The practice of many countries has shown that green roofs are one of the solutions to the problem of rainwaters on the urban areas. The aim of the study was to assess the retention ability of three green roofs of extensive type with different substrate composition (two mineral-organic mixtures, one mineral mixture). The research was carried out at the Water Centre of the Warsaw University of Life Sciences in Warsaw (Ursynów district) in the period from June to November in 2016. The obtained results were compared with observation of the reference model - bituminous roof. Model studies have shown that green roofs retained water in the range from 9.5 mm to 67.1 mm. The average runoff coefficients for green roof types in the period from June to November in 2016 were from 0.31 to 0.33. The obtained results showed slight differences in outflows with different substrates. During high rainfall, the differences in the runoff between the green roofs and the reference roof ...
