The effect of land use on surface water pollution from non-point sources

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F19%3A00336602" target="_blank" >RIV/68407700:21110/19:00336602 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

The effect of land use on surface water pollution from non-point sources

Original language description

Land use related to intensive agriculture production is the most important non-point pollution source for surface water. The pollution can be mainly characterized by erosion and sediment transport processes and can be identified as suspended solids and erosion Phosphorus occurrence in streams, rivers and water reservoirs, with all related consequences. Catchment with size of 35000 km2 has been analyzed from point of view of input of erosion sediment and erosion Phosphorus from single fields and pollution has been tracked from single field until its deposition within water reservoir. The methods used were mathematical model WATEM/SEDEM and advanced methods of GIS application using hydrological network structuring. The sediment and Phosphorus load has been balanced within more than 170.000 critical points at water courses and water reservoirs. Points has been classified into 5 categories, according its pollution load. The effect of recent land-use combined with landscape morphology on pollution load has been studied and optimum soil erosion control measures has been designed at selected most critical subcatchments. Different measures have been assessed and their control effect has been modeled. There has been identified and documented, that diverting technical soil erosion control measures have low or even negative impact on sediment and especially erosion Phosphorus delivery into water bodies. Therefore, soft control measures, based mainly on spatial grassing of arable land and application of conservation tillage practices or nature based buffer zones are necessary to limit agricultural pollution of water courses. Different scenarios of conversion of arable land into grassland has been examined and optimization procedure, related to morphology and required effect on sediment and Phosphorus load reduction has been documented and presented.

Czech name

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Czech description

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Type

O - Miscellaneous

CEP classification

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OECD FORD branch

20701 - Environmental and geological engineering, geotechnics

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů