Природні та штучно створені об’єкти поверхневих вод у користуванні лісогосподарських підприємств Львівської обл.

Abstract

The areas of land with natural and artificial surface water bodies owned and used by forestry enterprises of administrative and territorial units of Lviv region are analyzed. Their classification according to the rating values of the described indicators is made, and schematic charts are drawn. The interval for determining the number of classification groups was calculated geometrically as the amplitude between the maximum and minimum values of the areas is too large. Forestry enterprises using water from natural and artificial surface water objects covering an area of 1,963.3 ha (including 1.5 % (642.1 ha) from natural streams (rivers and springs) and lakes and 3.1 % (1,321.2 ha) of artificial surface water bodies (canals, reservoirs and trenches, ponds and artificial water bodies) account for 12.9 % of the total area (42,781.6 ha) of lands of this category in the region. The largest areas of land with natural and artificial surface water bodies owned and used by forestry enterprises are recorded in Sokal (315 ha), Zhovkva (262.8), Busk (235.1), Skole (196.6), Brody (162.9), Mykolaiv (153), Drohobych (125.1), Radekhiv (120), Turka (118.7), and Kamyanka-Buzka (92.8 ha) districts, medium and moderate ones – in Staryi Sambir (68.3 ha) and Yavoriv (27 ha) districts, and the smallest ones – in Stryi (18 ha), Horodok (15), Zolochiv (15), Pustomyty (13), Sambir (7), Zhydachiv (6), Peremyshliany (4), and Mostyska (2.7 ha) districts and in Lviv (5.3 ha). The largest areas of land with natural surface water bodies owned and used by forestry enterprises are recorded in Skole (196.1 hа), Drohobych (124.6), Turka (118.7) and Staryi Sambir (65.8 hа) districts, considerable, medium and moderate ones – in Brody (29.8 hа), Zhovkva (25.5), Yavoriv (21), Zolochiv (13), Kamyanka-Buzka (11.7), Stryi (17) and Sambir (17 hа) districts, small, very small and too small – in Sokal (6.0 hа), Mostyska (2.7), Mykolaiv (2), Busk (1.9) and Zhydachiv (1 hа) districts and in Lviv (5.3 hа), in Horodok, Peremyshliany, Pustomyty and Radekhiv districts no such land has been recorded. The largest and considerable areas of land with artificial surface water bodies owned and used by forestry enterprises are recorded in Sokal (309.0 hа), Zhovkva (237.3), Busk (233.2), Mykolaiv (151), Brody (133.1), Radekhiv (120) and Kamyanka-Buzka (81.1 hа) districts, medium and moderate ones – in Horodok (15 hа), Pustomyty (13), Stryi (8), Yavoriv (6) and Zhydachiv (5 hа) districts, small, very small and too small – in Peremyshliany (4 hа), Staryi Sambir (2.5), Zolochiv (2), Skole (0.5) and Drohobych (0.5 hа) districts, in Mostyska, Sambir and Turka districts no such land has been recorded. Key words: surface water, streams, water reservoirs, forestry enterprises.