Based on Vegetation Dynamics Development Tool (VDDT), the 100(1989-2089) years forest landscape dynamics in the western margin of Sichuan Basin under 3 scenarios were simulated. Management measures such as closing the land for reforestation, forestation, stand improvement, reinforcement planting can increase forest land area, reduce open forest land area,suitable land for forest and shrub land.Artificial Cryptomeria fortunei plantations get more negative influences from rodent damage than artificial Cunninghamia lanceolata plantations. After earthquake, rodent damages intensity and frequency increased, suitable land for forest and unused land first increased and then decreased, forest land first decreased and then increased; forest land decreased and unused land increased in 2089, compared with the scenario without rodent damage or earthquake.
Based on multi-spectrum satellite remote sensing (RS) images and GIS, the evolution characteristics of Irtysh River in Xinjiang were analyzed. The results show that the Irtysh River is a composite meander integrated by valley meander and free meander according to the geomorphic features formed by meandering. Judging from the characteristics of this river, the average slope of riverbeds is 0.5188 ‰; the average curvature is 1.72. By observing dry oxbow lake sites, right bank swung more violently than left bank in historical period. Since 1972, 23 reaches were cutoff; 15 reaches’ concave banks expanded; 55 tributaries broke away from the main riverway because of flow cutoff; 94 reaches moved to downstream. These changes increased sharply since 1997 after the construction of key water control project in the upstream of the Irtysh River.
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