| 师江澜,杨改河.澜沧江源头杂多县1985～2000年土地利用变化分析[J].干旱地区农业研究,2008,(3):236~240 |
| 澜沧江源头杂多县1985～2000年土地利用变化分析 |
| Analysis of LUCC of the first county — Zaduo County in the source area of Lancangjing River |
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| DOI：10.7606/j.issn.1000-7601.2008.03.47 |
| 中文关键词: 土地利用变化 时空格局 GIS 澜沧江源区 杂多县 |
| 英文关键词:LUCC spatial-temporal pattern GIS source area of Lancangjiang River Zaduo County |
| 基金项目:青海省重大科技攻关项目(2002-N-106) |
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| 中文摘要: |
| 利用三期(1985、1995和2000年)Landsat TM图像解译结果,应用GIS技术,分析了杂多县土地利用的数量变化和时空变化特征。结果表明:15年期间杂多县土地利用变化具有稳定微动性,但在1985~1995年和1995~2000年两个研究时段的变化特征存在明显差异。19851995年,土地利用转移面积为5 954.00 km2,占该县总面积的16.47%,转移主要发生在草地内部及草地与未利用地之间,占总转移的93.87%,以高、中覆盖草地输出、低覆盖草地输入为特征,表现为草地数量增加,质量下降;1995~2000年,土地利用变化面积为6027.75 km2,占全县总面积的16.67%,主要转移类型为中低覆盖草地—未利用土地、中覆盖—低覆盖草地、低覆盖草地-中覆盖草地、沼泽地-草地,占总转移面积的90.87%,低覆盖草地向高、中覆盖草地正转移,草地数量减少,质量好转。两个研究时段的土地利用变化集中分布在杂多县东部、西南和西部。 |
| 英文摘要: |
| uantity but the characters during the t wo periods of 1985～1995and 1995～2000were obviously different ．（2） During the period of 1985～1995 the total land －diversion amount was 5954．00km2 accounting for 16．47％ of the total land amount in Zaduo County ；land-diversion mainly occurred among different coverage degree grassland or bet ween grassland and non-used land accounting generally for 93．87％ of the total land-diversion amount ；another character was that the amount of grassland was increased but its quality decreased ．（3） During the period of 1985～1995 the total land-diversion amount was 6027．75km2 accounting for 16．67％of the total land amounts in Zaduo County；the mainland-diversion types were from mid or low-coverage degree grassland to nonuesd land from mid-coverage degree grassland to low-coverage degree grassland from low-coverage degree grassland to mid-coverage degree grassland and from wetland to grassland accounting for 90．87％of the total land-diversion amount ；the amount of grassland decreased but its quality increased ．At the t wo periods of 1985 ～1995 and 1995～2000 land-use diversion occurred obviously in the east S Wand west part of Zaduo County. |
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