The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
1019 
contour maps it was determined that the biggest migrations of 
dune forms (mainly within the moving dune belt) took place 
during last 20 years. The maximum migrations of dunes in the 
period of 1984 through 2004 amounted even to 320 m. 
Figure 2. Horizontal migration and evolution of selected 
moving dune. 
Figure 3. Changes'of selected moving dune in the period of 
time 1964-2004 - 3D view. 
The selected dune, which is visible in Figure 3b, was formed 
through the joining together of two smaller ones (Fig.3a.). The 
profile analysis (Fig. 4.) shows that during the investigated 
period of 1964 - 2004, as a result of the operation of eolian 
processes, the moving dune (A) has reached a much slower 
dune (B), thus forming a new object of a greater volume. 
rok 1964 r»k 2W4 
3528492.24,6128947.64 3529141.93,6129206 79 
Figure 4. The profile of selected moving dune for two years 
1964 and 2004. 
The differential maps of elevation changes were developed by 
subtracting the 1995 DEM elevations from the 2004 DEM 
elevation values and correspondingly for the remaining DEMs. 
As a result, this made it possible to recognize areas of elevation 
gain through the accumulation of sand and areas of elevation 
loss caused by erosion (Fig.5.). 
Figure 5. Differential map of elevation between 1995 and 2004 
The obtained image comparison results enabled to identify 
vegetation changes over time 1979 to 2000 in the Park area. 
Based on the classification results and NDVI vegetation index it 
has been observed that those elements of the environment, 
which are classified as dunes 1 (fields of exposed sand), dunes 
2 (partly covered with plants), and agricultural land are marked 
by the highest dynamics of their changes. As the analysis shows 
(Table 3), ca. 40% of agricultural land has been transformed 
into meadows and pastures. More than 50% of active dune 
fields have not been changed, whereas 40% of them have been 
invaded by dune flora. More than 14% of dune fields, which 
were covered with plants, turned into dune forests. Meadows 
and pastures have been afforested in 22% and 17%, respectively. 
On the basis of obtained results, it has been determined that ca. 
46 km2 of land surface have changed the character of land 
cover, which constitutes 23.5% of the whole analysed area. 
1979 
2000 
dunes 1 
dunes 2 
water 
forests 
meadows 
agricultural 
dune forest 
dunes 1 
53.5 
5.7 
0.0 
0.0 
0.1 
2.2 
0.0 
dunes 2 
40.2 
62.3 
0.1 
1.0 
1.5 
15.4 
7.0 
water 
6.0 
11.1 
99.5 
8.8 
0.4 
1.9 
3.2 
forests 
0.1 
4.3 
0.3 
68.3 
21.6 
16.7 
17.3 
meadows 
0.0 
0.7 
0.0 
7.9 
63.2 
39.1 
2.2 
agricul 
tural 
0.1 
1.6 
0.0 
4.9 
11.8 
22.4 
2.6 
dune forest 
0.1 
14.4 
0.0 
9.2 
1.4 
2.4 
67.7 
Table 3. Changes of land cover between 1979 and 2000 [%]