基于遥感监测、现地踏查、样地与样线调查、问卷调查,研究了青海省贵南县荒漠化和沙化土地现状。结果表明:2014年贵南县荒漠化土地面积3 691.81 hm ²,沙化土地面积99 131.41 hm ²,有明显沙化趋势土地面积35 418.62 hm ²;与 2009年相比,5年间荒漠化面积净减少1 154.38 hm ²,其中中度面积减少516.11 hm ²,重度面积减少786.02 hm ²,极重度面积减少59.88 hm ²;5年间沙化土地面积减少2 467.52 hm ²,其中中度面积减少768.55 hm ²、重度面积减少601.29 hm ²、极重度面积减少1 301.83 hm ²;5年间有明显沙化趋势土地面积减少5 035.82 hm ²,呈现整体遏制、持续缩减态势,但防治形势依然严峻。

Based on the remote sensing satellite monitoring,line transect and sample investigation methods and questionnaire method,desertified land and sandified land in Guinan County of Qinghai Province from 2009 to 2014 were studied.The results indicate that the desertified land area in Guian county was 3 691.81 hm ² in 2014,the sandifed land area was 99 131.41 hm ²,the trend of sandified land area was 35 418.62 hm ².Compared with these in 2009,over 5 years the desertified land area decreased by 1 154.38 hm ²,while the sandified land area decreased by 2 467.52 hm ²,at meantime the trend of sandified land area diminished by 5 035.82 hm ².Despite the austere situation of combating desertification,there has been a positive situation featured by deterioration generally restrained,desertified and sandified land area acreage decreased continuously.Finally,some countermeasures and antidotes to the problem are proposed on the basis of the analysis of the present situation of desertification.