赤峰市沙化土地监测与评价

对赤峰市沙化土地1994年和2004年的情况进行了综合分析,结果表明:沙化土地总面积为1914983hm2,占全市总面积的22.2%;有明显沙化趋势的土地1029690hm2,占全市总面积的119%;流动沙地占7.8%,半固定沙地占10.1%,固定沙地占80.5%,露沙地占0.5%,沙化耕地占1.1%;沙化耕地占1.1%,沙化林地占24.8%,沙化草地占65.8%,未利用沙化土地占8.3%;轻度沙化土地占46.4%,中度沙化土地占35.2%,重度沙化土地占10.1%,极重度沙化土地占8.3%;10年间,沙化土地面积减少748797hm2,其中固定沙地增加81089hm2,半固定沙地减少174588hm2,流动沙地减少49066hm2,露沙地增加7457hm2,沙化耕地减少613690hm2。

Monitoring and evaluation of desertification land in Chifeng City

Tthe situation and the change of deseltification land in Chifeng City during 1994- 2004 were studied comprehensively. It is show that total desertification land area and the land with obvious desertification trend is 1 914983 hm^2 and 1 029 690hm^2, 22.2% and 11.9 % of the total area of Chifeng city respectively, From point of fixed situation, shifting sandy land, half-fixed sandy land, fixed sandy land, exposure sandy land and desertifieation cultivated land is 7,8%, 10.1%o, 80.5%, 0.5% and 1.1% respectively. From point of use manner, desertification cultivated land , desertification forest land, desertification grassland and unused desertification land is 1,1%, 24.8%, 65.8 and 8.3% respective. From point of desertification degree, light desertification land, middle desertification land, serious desertification land and super serious desertification land is 46.4%, 35.2%, 10.1% and 8.3% respectively. During 1994 to 2004, the desertification land of Chifeng City reduce 748 797hm^2.Fixed sandy land increase 81089 hm^2, half fixed sand reduce 174 588hm^2, shifting sandy land reduce 49 066 hm^2, exposure sandy land increase 7 457 hm^2 and desertification cultivated land reduce 613690 hm^2.