Piniewski, Mikolaj; Acreman, Michael C.; Stratford, Charles J. 
ORCID: https://orcid.org/0000-0003-3867-5807; Okruszko, Tomasz; Gielczewski, Marek; Teodorowicz, Mariusz; Rycharski, Marek; Oswiecimska-Piasko, Zuzanna.
2011
Estimation of environmental flows in semi-natural lowland rivers - the Narew basin case study.
Polish Journal of Environmental Studies, 20 (5).
1281-1293.
This paper discusses a new environmental flow method based on the adapted building block approach. A four-step procedure is outlined in this paper:
(1) selecting biota of interest and organizing a team of specialists;
(2) selecting river reaches of interest;
(3) defining flow requirements of selected biota;
(4) defining environmental flow indicators.
The focus is placed on two elements of river and wetland ecosystems: fish and floodplain wetland vegetation. The method is applied to identify changes in the environmental flow indicators between 1976-83 (“past”) and 2001-08 (“present”) in 16 selected river reaches of the Narew basin, a large semi-natural lowland catchment situated in northeastern Poland. The results indicate that hydrological conditions for fish and floodplain wetland vegetation were significantly better in the past period compared to the present.
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