基于MODIS SWIR數(shù)據(jù)的干旱區(qū)草地地上生物量反演及時(shí)空變化研究
[Abstract]:Based on MODIS remote sensing data of Gulang County and surface measured sample data, the sensitive index of aboveground biomass of grassland in arid area was selected, and the inversion model of aboveground biomass of grassland in this area was constructed. The temporal and spatial dynamics of grassland yield from 2000 to 2014 were analyzed. The results showed that the inversion model of aboveground biomass of grassland based on NDTI index had higher prediction accuracy, and could be used for rapid monitoring of aboveground biomass of grassland in a wide range of arid areas. The spatial distribution of the largest aboveground biomass of grassland in the growing season of Gulang County from 2000 to 2014 was significantly different. The aboveground biomass of temperate steppe desert and temperate desert gradually decreased from south to north. The peak biomass of different grassland types appeared in July and August, and there were differences among different grassland types. The results can provide a scientific basis for dynamic monitoring and evaluation of grassland resources and ecological environment in arid areas.
【作者單位】: 甘肅省水土保持科學(xué)研究所;
【基金】:甘肅省自然科學(xué)基金項(xiàng)目(1506RJZA176) 甘肅省科技支撐計(jì)劃項(xiàng)目(1504FKCA047)資助
【分類號(hào)】:S812
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