Arid Regions

Modeling and Visualization of Water Use in an Arid Region: Case Study from El Paso, Texas-Ciudad Juarez, Mexico

Problem Description / Relevance to Water Security: 

This case study took place in the Rio Grande valley which is the fastest growing region in the United States. Water in the southwest can act as a break on the economic development of this region.

ICT Application / Outcome: 

The model was structured into three main sections of hierarchical blocks: population, water demand and water supply (Figure 2).  From these sections, the Hueco Bolson storage level was determined.  Three plotters were then used to plot demand, population and Hueco Bolson Storage levels.

Use of Remote Sensing and GIS in Water Resources Management: North Western Sahara Aquifer System (NWSAS)

Problem Description / Relevance to Water Security: 

The North-Western Sahara Aquifer System, which stretches over an area of more than one million square kilometers, is shared by Algeria, Tunisia and Libya. Due to the structural configuration and climate type of the region, the recharge of the NWSAS is very limited. These aquifer systems represent geological reserves whose natural outlets (springs and foggaras) led to the development of oases where people lived, for centuries ago, in perfect harmony with the Saharan ecosystem.

ICT Application / Outcome: 

As water resources are mainly related to agriculture in the area of interest, a first vegetation mapping was realized based on MODIS time-series NDVI covering the NWSAS area over the last 10 years in order to establish a first vegetation areas inventory, to better understand the spatial distribution and year-to-year variability in irrigated areas.

Results: