Figure 1

Location map of the region surveyed"

Figure 2

Methodology implemented in this work"

Table 1

List of images used in this study"

Table 2

Thresholds considered establishing the map of probability to desertification"

Table 3

Parameters used to perform field verification"

Figure 3

Maps showing changes in NDVI for a couple of dates: a) 1990-1995; b) 1995-2000; c) 2000-2005; d) 2005-2011"

Figure 4

Maps showing the changes of NDWI for a couple of years: a) 1990-1995; b) 1995-2000; c) 2000- 2005; d) 2005-2011"

Figure 5

Maps showing changes of ST for a couple of dates: a) 1990-1995; b) 1995-2000; c) 2000-2005; d) 2005-2011"

Figure 6

Maps showing the change of IO for a couple of years: a) 1990-1995; b) 1995-2000; c) 2000-2005; d) 2005-2011"

Figure 7

Maps of total balance for a) NDVI; b) NDWI; c) ST; d) IO"

Figure 8

Map showing the areas with the highest probability of developing processes of desertification in the SLPP."

Figure 9

Landscapes related to different stages of desertification probability: a) Very low (point SCh-3), b) Low (point Sch-12), c) Moderate (point Sch-9), d) High (point Sch-19) and e) Very high (point Sch-16). The pictures were acquired during the field verification."

Table 4

Surface affected by the level of probability of developing desertification"

Table 5

Confusion matrix showing the agreement between field observations (columns) and the estimated data (rows)"

Figure 10

Comparison of the behavior of a) NDVI, b) ST, c) IO, and d) NDWI with precipitation or temperature obtained from the National Weather Service. The data of temperature and precipitation are the average of 15 days before the dates analyzed in this work. The standards were obtained based on information from 50 climatological stations."

Table 6

Average values obtained during each period analyzed for a) NDVI, b) ST, c) IO and d) NDWI. Subsection e) corresponds to the average value of the total balance for each factor"