- Tytuł:
-
Odtworzenie nieistniejących jezior jako element zwiększania retencji leśnej i pozaprodukcyjnych funkcji lasu
Restoration of non-existing lakes as part of increasing forest retention and enhancing non-productive functions of forests - Autorzy:
- Ptak, M.
- Powiązania:
- https://bibliotekanauki.pl/articles/989832.pdf
- Data publikacji:
- 2015
- Wydawca:
- Polskie Towarzystwo Leśne
- Tematy:
-
lesnictwo
lasy
funkcje pozaprodukcyjne
retencja wodna
zasoby wodne
jeziora srodlesne
niecki jeziorne
odtwarzanie
lake disappearance
water resources
retention
hydrotechnical works - Opis:
- The aim of the work is to present the possibility of increase in water resources and creation of new non−productive forest functions by restoration of the non−existent forest lakes. Ten currently non−existent natural forest lakes were randomly selected in northern Poland and their extent and volume of the water deposited in their basins were determined. The analysis was performed in two stages. At first, based on the cartographic materials (1:25 000) from XIX and XX century, the location of the lakes before their complete disappearance was determined and their surface were calculated. Bathymetric plans were reconstructed based on the 1:10 000 topographic map. Obtained contour lines constituted the isobaths necessary to calculate the volume of the using Penck method. The results show a large−scale transformation of the natural environment in the forests. The total area of the analyzed lakes before their disappearance amounted to nearly 800 ha, and the total volume of water was estimated to 12 million m³. The main activities aimed at achieving the foregoing goal include damming of rivers and lakes, construction of artificial reservoirs, etc. At this point the possibility of restoring the natural hydrographic network elements to their original condition should be considered. Such an approach would certainly be less harmful to the environment than artificial structures, whose long−term impact on the environment is not always possible to determine. Yet another issue is the possibility of adaptation of the reconstructed forest lakes and their surroundings in order to achieve the objectives related to the non−productive forest functions. Based on the preliminary information on the location, area and volume of the lakes, more detailed analysis should be made taking into account natural needs (changing the species composition of the forest, increasing biodiversity, etc.) and economic aspects (e.g. leisure and recreational facilities).
- Źródło:
-
Sylwan; 2015, 159, 05; 427-434
0039-7660 - Pojawia się w:
- Sylwan
- Dostawca treści:
- Biblioteka Nauki
Artykuł