松嫩沙地荒漠化现状和原因

通过对松嫩沙地2000年的遥感监测表明:松嫩沙地共有盐渍化土地面积1613.17 km2和沙漠化土地面积3765.38km2,分别占整个沙地面积的3.13%和7.3%。盐渍化最严重的是大安,共有盐渍化土地894.19 km2,占到总盐渍化土地面积的55.43%;在沙漠化土地中,草场沙漠化土地3130.51 km2占沙漠化总面积的83.14%,耕地沙漠化土地634.87 km2占沙漠化土地总面积的16.86%。其中以轻度和中度沙漠化土地为主,分别占50.72%和36.81%,重度沙漠化土地占12.23%,严重沙漠化土地面积较少,仅占0.24%。土地沙漠化最严重的是大庆,占整个行政区域面积的19.15%,面积达到969.65km2。在文章的结尾,简要分析了松嫩沙地荒漠化发生的自然和人为原因。

The Status and Causes of Desertification in Songnen Sandy Land

Monitoring of Songnen sandy land in 2000 showed there were 1613.17 km2 of salinized land and 3765.38km2 of all kinds of desertification land in Songnen sandy land,accounting for3.13% and 7.3% of the totoal area respectively.The most severely salinized area was in Da'an,with 894.19 km2 of salinized land,accounting for 55.43% of total salinized land.For sandy desertification land,desertified meadow land amounted to 3130.51 km2(83.14% of total sandy desertification land) and desertified farmland was 634.87 km2(16.86% of the total).Desertificated land was primarily composed of light and moderate sandy desertification land,accounting for 50.72% and 36.81%;severe and very severe desertificated land accounted for 12.23% and 0.24% respectively.In all the 13 counties(or cities),Daqing was the severest sandy desertified area,with a sandy desertification land of 969.65km2,accouting for 19.15% of its territory.At last,we analyzed the natural and human factors which might result in sandy desertification in Songnen sandy land.