Micro-level Drought Vulnerability Assessment in Peddavagu basin, a Tributary of Krishna River, Andhra Pradesh, India

EarthzineArticles, Earth Observation, Original, Sections, Themed Articles, Water Availability Theme

Map showing the location of Peddavagu basin, a tributary of Krishna River basin

Map of Digital Elevation Model of Peddavagu basin, a tributary of Krishna River basinAssessing the micro-level spatial drought vulnerability in South Central India can assist with coping measures for farmers and others in the region. This study used various thematic maps to derive a village-level drought vulnerability map, which will be useful to drought management and preparedness in the future.

Groundwater Storage Estimates in the Central Valley Aquifer Using GRACE Data

EarthzineArticles, Earth Observation, Original, Sections, Themed Articles, Water Availability Theme

A map outlining the Central Valley aquifer.

Drawing of the GRACE satellite orbiting Earth.A project on the use of Gravity Recovery and Climate Experiment (GRACE) data to estimate changes in groundwater storage in the Central Valley aquifer in collaboration with the California Department of Water Resources (DWR). This work has the potential to improve California‰Ûªs groundwater resource management and the use of existing hydrologic models for the Central Valley.

The Water Question in Lake Chad Basin: Lessons from the Drought in Somalia

EarthzineEcosystems Theme, Original, Themed Articles, Water Availability Theme

A Flow Chart of relation between climate change and glacier length.

Image of study areas showing perennial rivers in dark blue and intermittent rivers in sky blue in the Lake Chad Basin, Somalia, and AfricaWill an effective mechanism be put in place to detect the onset of drought in Africa‰Ûªs Lake Chad Basin? What needs to be done to minimize adverse effects of drought in the basin? In this essay, scientific perspectives are applied to explain and compare the complex nature of the current drought in Somalia and the Lake Chad Basin.

GrapeLook: Improving Agricultural Water Management using Satellite Earth Observation

EarthzineAgriculture, Articles, Earth Observation, Original, Sections, Themed Articles, Water Availability Theme

Image of urban flash flooding in Arlesey, U.K, 2004. Photo by Malcolm Campbell. http://commons.wikimedia.org/wiki/File:Flash_flood_-_geograph.org.uk_-_657563.jpg

picture of Block with wine grapes in Western Cape Province.Limited water resource availability and efficient water management are major global challenges facing policymakers in many countries of the world, and South Africa is no exception. Advanced satellite technologies offer new opportunities to address these issues. In 2010, the GrapeLook project was initiated, providing information on crop water, growth and nitrogen status during the growth season using satellite data. The first demonstration year provided users with a deeper insight into the temporal and spatial processes in vineyards to improve water productivity.

Using the Landsat Archive for the Monitoring of Mediterranean Coastal Wetlands: Examples from the GlobWetland-II Project

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A photo showing the author turning over a cover crop of winter rye on Jan. 2, 2012. In three of the past six years, ground freeze-up, which historically occurred by November, has been delayed into January.

Figure showing multi-temporal Wetland Identification and Delineation products (1975, 1990, and 2002) for exemplary sites between Izmir and Bodrum (upper part: region around Tahtali Dam; lower part: Bodrum airport area).Coastal wetlands in the Mediterranean have undergone considerable land use and land cover changes in recent decades, by way of urban growth and increasing tourism infrastructure. The GlobWetland-II project makes use of the 35 years of Landsat archives for a basic identification and delineation of wetlands during 1975, 1990, and 2005. The authors present results of wetland identification and delineation mapping from 1975 to 2002, for the test sites of the Menderes Delta and GÌ_llÌ_k Bay.

Freshwater resources management: Starting SMART characterization of New Zealand’s aquifers

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Table showing key phrase totals over the study period for each dataset with the dominant key phrase in bold. A usage ratio is computed by dividing GWtotal by CCtotal. A higher ratio equates to higher GW key phrase usage.

cropped image from figure 2 showing a country's mapDespite the importance of New Zealand’s groundwater resources, we still lack essential information related to their basic properties which are required to avoid overexploitation of resources and water scarcity situations where humans and the economy will be stressed due to insufficient water supply.

Use of Remote Sensing for Groundwater Mapping in Haiti

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Figure showing Environmental and anthropomorphic issues to consider in evaluating system sustainability.

Figure showing ASTER band combination comprising R:14/12; G:13/14; B:12/13; imagery acquired Jan. 21, 2010. Image Source: NASA and METI.Sustainable access to safe drinking water is a public health issue directly linked to the economy in Haiti and around the world. This research applies remote-sensing techniques to data from ASTER satellite imagery to produce maps useful for placing community-level water-filtration installation systems in Port au Prince and surrounding areas.