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

Table 6

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 three (1960–1989).

No.	Series 1: 1960–2010	Series 3: 1981–2010	Tendency	Surface area with changes		Percentage area of the watershed
				km^2	%
1	Presence	Absence	↓	1,500.0	98.9	1.12
2	Absence	Presence	↑	16.3	1.1	0.01
			Total	1,516.3	100	1.13