Antropogeniczne przekształcenia krajobrazu dna doliny Piławy na odcinku Mościsko-ujście do Bystrzycy (Przedgórze Sudeckie) – próba oceny ilościowej

Katarzyna Kozina

Abstrakt


Human transformation of the valley floor of the Piława river between Mościsko and the mouth to the Bystrzyca river (the Sudetic Foreland) – an attempt of quantitative assessment

An attempt of quantitative assessment of human transformation of the landscape was taken for the valley floor of the Piława river on the Sudetic Foreland between Mościsko and the mouth to Bystrzyca. The new method of evaluation was applied. Although Piława crosses a fore-mountain area, it has many features of a lowland river. The assessment has been based on the results of field observation. The essence of these observation was a registration of the individual components of the environment of the valley floor. A final evaluation was carried out on the basis of observation, in the spatial arrangement, leaning on punctual classification. Next the studied area was divided into 0.5 km long sections according to the downstream. As a result of this division 76 researched areas have been distinguished: 38 on the left river bank and 38 on the right river bank. The paraetric assessment has been carried out for six features: the character of the river channel, the degree of transforming the relief of the lagoon plain individually for the right and the left river bank, the interest-bearing share in the general surface area of the section appropriately: of forests, meadows and pastures (amongst opened areas), of the arable land and the infrastructure and the settlement building development. Four classes of classification were appointed about spot weight 4, 3, 2 and 1 point, depending on the degree of human transformation. The criteria of human transformation of the landscape has been devised. Every area could receive maximum 24 points, minimum – 6 points. Basing on get spot scores six landscape classes, from A to F, were appointed, where class A contains the landscape which is the most similar to natural (21-24 points), whereas class F contains the landscape with the greatest degree of the transformation (6-9 points). Amongst 76 analyzed sections there is only one in class A. In class B there are 10 sections, in class C-15, in class D-26, in class E-20 and in class F-4 sections. The landscape of the narrow, right-bank part of the lagoon plain is more similar to natural, while the landscape of left-bank part of the lagoon plain is more transformed by human. There are differences in transformation of the same sections but characterized separately for the right and the left river bank. The results of the assessment of the human transformation have been used for creating a map, which illustrates the spatial diversity of the human transformation of the landscape of the valley floor of the Piława river between Mościsko and the mouth to Bystrzyca.


Słowa kluczowe


krajobraz, przekształcenia antropogeniczne, dno doliny, ocena, landscape, human transformation, valley floor, assessment

Pełny tekst: PDF