Przestrzenne modele ksztaltowania lesistosci kraju

• Autorzy: Lonkiewicz B
• Języki publikacji: PL

Abstrakty

PL

Praca przedstawia wyniki badań nad modelowaniem, w systemie informacji przestrzennej PA ARC-INFO, optymalnej struktury rozmieszczenia lasów w Polsce. Na podstawie analizy 25 czynników przedstawiono trzy warianty zwiększenia lesistości kraju, uwzględniające potrzeby zagospodarowania gruntów marginalnych dla rolnictwa, wykorzystanie środowiskowych funkcji lasów w ograniczaniu degradacji powierzchni ziemi oraz aspekty polityki ekologicznej i społecznej.

EN

In Poland there is an increasing process of giving up the agricultural use of soils of the lowest quality whose total surface is estimated for about 3.3 mln ha. This phenomenon creates possibilities to intensify the woodiness of the country from 27,8 to 30 p.c. (by afforestation of 700 thous. ha in the near future) and to 33 p.c. (by afforestation of further 800 thous. ha in the perspective). The scale of the problem, as well as the ecological and economic conditions justify the need for solutions in the national, and next, in the regional and local physical planning. By means of computer system of information PC ARC-INFO 3, 4 D, a valorization of all the conditions in the country has been performed, according to 25 criteria comprizing: -the structure of land use (soil quality classes, their usefulness for agriculture, surface features, watersheds, underground waters) - joint appraisal - Fig. 1, -function of forests in the environment (erosion, stepping, water pollution, low degree of woodiness) -joint appraisal - Fig. 2. -ecological policy (natural value system of protected areas, protected catchments, touristic regions, system of forest areas) - joint appraisal - Fig. 3, -socio-demographic problems (supply of land, ecological endangerement, migration movements of population, unemployment, agricultural economy of large areas) - joint appraisal - Fig. 4, -limitations of the increase in woodiness, urbanization, high level of agricultural production, extraction of raw materials, swamping areas, high degree of woodiness. Applying a differentiated arrangement of adopted criteria in rangs, three models preferring the increase in the woodiness of the country have been proposed. The maximal model (Fig. 5) determined by preference of the criteria of the land use structure and of the functions of forests, justify the afforestation of 1520 thous. ha and a big share of afforestation in the northern zone of the country. The environmental model (Fig. 6) which gives preference to the role of forests in the environmental protection, indicates the need for afforestation of 750 thous. ha with particular account to the central zone of the country. The model of physical system (Fig. 7) providing the afforestation of 780 thous. ha is determeined by an arbitral selection of natural values arising in a continuous range and knot system. The choice of the model and its possible modification are conditioned by anticipated determination of comprehensive ecological and economic policy in scope of management of natural resources. Before strategic decisions, it would be appropriate to stimulate the afforestation in those communities which have obtained high prerfercnces in all the three models (Fig. 8). ecological policy (natural value system of protected areas, protected catchments, touristic regions, system of forest areas) -joint appraisal - Fig. 3,

Słowa kluczowe

PL

zalesianie; informacja przestrzenna PA ARC-INFO; modele przestrzenne; lasy; lesistosc

• Wydawca: -
• Czasopismo: Człowiek i Środowisko
• Rocznik: 1994
• Tom: 18
• Numer: 1
• Opis fizyczny: s.97-113,rys.,tab.

Twórcy

autor

Lonkiewicz B

• Instytut Badawczy Lesnictwa, 02-362 Warszawa, ul.Bitwy Warszawskiej 1920 r. 3