Identification of Variations in the Climatic Conditions of the Lerma-Chapala-Santiago Watershed by Comparative Analysis of Time Series

Table 5

Absolute, relative, and proportional areas of the Lerma-Chapala-Santiago watershed with changes in the presence or absence of mid-summer drought between time series one (1960–2010) and time series two (1960–1989).

No.	Series 1: 1960–2010	Series 2: 1960–1989	Tendency	Surface area with changes		Percentage area of the watershed
				km^2	%
1	Presence	Absence	↓	1,191.9	80.4	0.9
2	Absence	Presence	↑	291.1	19.6	0.2
			Total	1,483	100	1.1