Meteorological Drought, Hydrological Drought, and NDVI in the Heihe River Basin, Northwest China: Evolution and Propagation

Table 6

Changes in the area of the primary types of land use and transition matrix and the primary types of land use changes in the UHRB and MHRB (10⁴ hm²).

	Period	Land use types	Cultivated	Forest	Grassland	Water area	Built-up area	Unused land
UHRB	2000–2011	Cultivated	0.10	0.02	0.16	0.01	0.02	0.00
		Forest	0.05	1.84	16.78	0.48	0.00	1.81
		Grassland	0.29	0.65	42.13	1.27	0.03	6.13
		Water area	0.04	0.06	0.96	0.91	0.01	0.63
		Built land	0.03	0.00	0.04	0.00	0.02	0.00
		Unused land	0.00	0.08	7.83	0.57	0.00	16.87
MRHB	1975–2010	Cultivated	14.41	0.04	0.26	0.05	0.28	0.15
		Forest	0.42	1.20	0.21	0.01	0.01	0.12
		Grassland	3.97	0.26	12.86	0.16	0.06	1.70
		Water area	0.53	0.02	0.34	1.86	0.01	0.19
		Built land	0.06	0.00	0.00	0.00	1.54	0.00
		Unused land	1.84	0.38	1.46	0.14	0.22	62.76
MRHB	1975–1987		14.40	1.52	15.33	2.22	1.60	65.52
	1987–1992		15.25	1.21	14.49	2.04	1.34	66.88
	1992–2001		16.48	1.23	14.29	2.11	1.41	67.04
	2000–2010		17.88	1.25	13.03	1.80	1.71	63.87