67
The changes of WL per years (1999–2015) and per season for the year 2015 were
compared in some of the wells to observe their evolution at annual and seasonal
scales (Fig. 4.4a, 4.4b respectively). It can be seen that in four of these wells the
level changes are imperceptible, while for the other four the level fluctuates and
Fig. 4.3 Distribution of depletion of water level (WL) in aquifers semi-urbanized in the surroundings of the city of Chihuahua
4 Changes in the Vegetation Cover and Quality of Aquifers in the Drylands of Mexico…
The changes of WL per years (1999–2015) and per season for the year 2015 were
compared in some of the wells to observe their evolution at annual and seasonal
scales (Fig. 4.4a, 4.4b respectively). It can be seen that in four of these wells the
level changes are imperceptible, while for the other four the level fluctuates and
Fig. 4.3 Distribution of depletion of water level (WL) in aquifers semi-urbanized in the surroundings of the city of Chihuahua
4 Changes in the Vegetation Cover and Quality of Aquifers in the Drylands of Mexico…