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

Figure 14

Heat maps showing PC between VCI lagged by 0–6 months and SPI (1-48)/SDI (1-12) for the period of 1999–2012 in the UHRM (Ylx). (a) PC ≥ 0.16, p < 0.05), (b) PC ≥ 0.18 or ≤ ‒0.15, p < 0.05) and in the MHRB (Zyx), (c) PC ≥ 0.15, p < 0.05), and (d) PC ≥ 0.16 or ≤ ‒0.18, p < 0.05).

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