45,177 research outputs found
Research of Microbiological Indicators of Quality of Surface Waters of Natural Environmental Territories of the Danube Basin
A comparative analysis of the sanitary and ecological state of surface watercourses in the upper part of the Danube basin (on theterritoryofUkraine) was carried out according to microbiological indicators. Similar hygienic studies were previously conducted in the middle and lower Danube inAustria,Slovakia,HungaryandRomania. InUkraine, the river network of theDanubeRiver basinwas not studied by microbiological indicators.The object of research is the watercourses on the territory of various zones of the nature protection object, which are different in function. This approach makes it possible to use hygienic indicators of water in protected areas of nature conservation areas as a reference for conducting background monitoring.The original design of the treatment plant based on the use of "Viya" fibrous carrier and "paste" technical structure is proposed. It was established that as the transition from the reserve to the economic zone occurs, the nitrate content in the water increases, the BOD increases in water, and the dissolved oxygen in the water decreases for all the watercourses studied. Significant differences in microbiological indices of watercourses of various functional zones of the protected object have been revealed.The possibility of using the sanitary-microbiological indicators of the river network as a reliable rapid test for assessing the state of environmental safety of nature conservation areas is shown
Fish zoning of some watercourses in Normandy [Translation from: Verhandlungen der Internationalen Vereinigung fuer Theoretische und Angewandte Limnologie 18, 1135-1146, 1972]
The identification of fish zones in western and central Europe has been the objective some major studies. This paper concerns a stream in Normandy specially studied by the author in 1969 and 1970 in the framework of a study on the role of the mean temperature in fish zoning. The paper propounds the comparative study of the morphodynamic and occasionally physico-chemical characteristics, as well as the results of previous sampling by electric fishing of the fish populations of two other streams of the higher Cretaceous layer and supplied by ”chalky” water in Normandy and Picardy
Detailed soil survey of eight watercourse command areas in Chishtian and Hasalpur tehsils
Irrigation management / Hydraulics / Channel improvement / Watercourses / Soil surveys / Hydrology / Climate / Mapping / Hydraulics / Infiltration / Pakistan / Fordwah / Azim
Tertiary sub-system management: proceedings of one-day workshop held on June 18, 1995 in Lahore, Pakistan
Irrigation management / Watercourses / Institution building / Water conveyance / Water distribution / Irrigation practices / Economic aspects / Pakistan
Design and practice of water allocation rules: lessons from warabandi in Pakistan's Punjab
Water management / Irrigation management / Water allocation / Watercourses / Water distribution / Design / Irrigation scheduling / Social aspects / Economic aspects / Water users / Distributary canals / Pakistan / Punjab
Impact of mining activities in the Upper Silesian Coal Basin on surface water and possibilities of its reduction
Due to the deposits of quality hard coal, the area of the Upper Silesian Coal Basin (USCB) has been one of the most industrialised regions in Europe for centuries. One of the most significant issues in terms of environmental impact and risks related to mining activities are the discharged mine waters. Mine water is pumped to the surface in great amount from mine workings of active underground mines both in Czech and Polish part of the USCB. In the past, the mine waters used to be discharged to nearby watercourses without systematic control of their amount and quality. It resulted in uncontrolled impacts on quality of the main rivers in the USCB. This is why a technically and economically demanding solution was adopted: discharging of mine (but also waste) waters through an artificial channel - so-called "Olza Collector" - directly to the Oder River, i.e. away of the Olza River and its minor tributaries. Automated control and dosing of waters to the Oder River depending on quality of the discharged waters and quality and quantity of the Oder surface water ensures maintaining of the total content of chlorides and sulphates in Oder below 500 mg/dm(3) with the efficiency of more than 90% of days in a year.Web of Science163696
Proposal for a Council Decision on the conclusion, on behalf of the Community, of the Convention on the Protection and Use of Transboundary Watercourses and International Lakes. COM (93) 271 final, 14 June 1993
Hydrobiological service for observations and control of surface waters in the USSR
Technological progress, having reached in our time an unprecedented speed, is still increasing the rate of mineral extraction, industrial construction, and the mastering of new kinds of energy is growing. Correspondingly the anthropogenic load on the biosphere is increased and that requires the comprehensive development of monitoring the anthropogenic changes in the natural environment. Among problems resulting from the scientific-technological development, a noticeable place is given to the problem of pure water. Surface land waters proved to be a sensitive link in the natural environment. The hydrobiological service for observations and control of the surface waters is one of the subsystems of the State/Federal Service for Observations and Control of pollution levels in environmental objects, conducted by the USSR State Committee for Hydrometeor- ology and Control of the Natural Environment. This paper summarises the the main principles of the organisation and goals of the national system of monitoring of the state of the natural environment in the USSR
Management of private tubewells in a conjunctive use environment: A case study in the Mananwala Distributary Command Area, Punjab, Pakistan
Irrigation managementIrrigated farmingTube well irrigationGroundwaterSurface waterWatercoursesConjunctive useWater marketSalinityFarming systems
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