Figure 4. Spatial distribution map of land use and land cover
(LULC) in Jiuyuangou watershed in 2010, 2015, and 2020.
Table 3 shows that grassland increased from 3613.33 ha in 2010 to
4349.05 hm2 in 2020, and forest land decreased from
2191.53 ha in 2010 to 1985.54 ha in 2020. Forest and grass cover in 2020
increased by 10% compared to 2010. Land use types changed from 2010 to
2020 in the Jiuyuangou watershed: 877.04 ha converted from cropland and
construction land to forest land and grassland, 447.48 ha converted from
forest and grassland to cropland and construction land, and 3542.24 ha
of forest and grassland area remained unchanged. Forest and grass
coverage areas in the basin increased, with remarkable results from
regional environmental governance and the project of returning farmland
to forest.
Table 3. Transfer matrix of LULC area in Jiuyuangou from 2010
to 2020(ha).