Special UNISPACE III volume

Marsteller, Deborah

Bibliographic data

Monograph

Persistent identifier:: 856485039

Author:: Marsteller, Deborah

Title:: Special UNISPACE III volume

Sub title:: including: ISPRS Workshop on "Resource Mapping from Space", ISPRS-EARSeL Workshop on "Remote Sensing for the Detection, Monitoring and Mitigation of Natural Disasters", ISPRS-NASA Seminar on "Environment and Remote Sensing for Sustainable Development", July 1999, Vienna, Austria

Scope:: IV, 170 Seiten

Year of publication:: 1999

Place of publication:: Coventry

Publisher of the original:: RICS Books

Identifier (digital):: 856485039

Illustration:: Illustrationen, Diagramme, Karten

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Monograph

Collection:: Earth sciences

Chapter

Title:: ISPRS Workshop on "Resource Mapping from Space"

Document type:: Monograph

Structure type:: Chapter

Chapter

Title:: MONITORING WATER RESOURCES AND AGRO-ECOSYSTEM PRODUCTIVITY FROM SPACE. Wim G.M. Bastiaanssen

Write comment:: Textverlust im Original.

Document type:: Monograph

Structure type:: Chapter

International Archives of Photogrammetry and Remote Sensing. Vol XXXII Part 7C2, UNISPACE III, Vienna 1999 39 /■î№\ I5PR5 UNISPACE III - ISPRS Workshop on “Resource Mapping from Space” 9:00 am -12:00 pm, 22 July 1999, VIC Room B Vienna, Austria I5PR5 productivity of the diverted water that is physically consumed be either, that intended process (e.g. evaporation of crops) or other processes (e.g. evaporation of wetlands), see Perry (1999) for more details. The data requirement for these water accounting procedures comprises the type of agro-ecosystem, the type of crop, the water requirements of each ecosystem to obtain maximum biomass production, the water requirements to get the maximum return of water resources, water consumption through actual evaporation, irrigated area, crop yield etc. Water use and land use needs to be linked in order to determine the productivity of water used in catchments and river basins (e.g. Bandara, 1998). The objective of this paper is to make water mid environmental policy makers alert of the global water scarcity and the current data crisis in land and water resources management. It also aims at making space agencies aware that their sensors should be dedicated to monitor water management practices in river basins applying low resolution and frequently acquired images. sources of water (Seckler et al., 1999); runoff being the difference between annual precipitation minus actual evaporation, net inflow from rivers and aquifers, desalinization and changes of water stored in snow, ice, reservoirs, lakes, aquifers and soil moisture. Remote sensing can help in mapping out precipitation (e.g. Petty and Krajewski, 1996), evaporation (e.g. Choudhuiy and DiGirolamo. 1998), irrigated area (e.g. Williamson, 1989), crop type (e.g. Jewell, 1989), reservoirs (e.g. Thimvengadachari et al., 1980) and snow and glacier covered area (e.g. Kite and Kouwen. 1992). Bio-physical properties such as vegetation cover, leaf area index, albedo, temperature of soil and canopy, absorbed photosynthetical active radiation, surface resistance to evaporation and soil moisture conditions can also be determined from remote sensing data to help describe how vegetation interacts with water and soil (Bastiaanssen, 1998). With this earth observation information on water resources and vegetative properties. PUWR can be assessed with a higher level of confidence. 2. INFORMATION NEEDS The insufficient understanding of the spatio-temporal variations of the processes in the soil-water-vegetation-atmosphere continuum limits the possibilities to evaluate the productivity' of resources: water, solar radiation, soils and C0 2 . The annually Potential Utilizable Water Resources (PUWR) consists of four Diagnosis of water management practices can help to keep the managers responsible for water diversions alert. Information on time accumulated water consumption and crop yield is a cornerstone for evaluating productive use of land and water resources (Wolff and Stein. 1998; Sakthivadivel et al., 1999). One example of experimental results on wheat yield per unit evaporation collected from internationally published data is 15 n Yield/evaporation (kg/m3) Fig. 1 Return of wheat (grain yield) to water consumption (evaporation) compiled from 87 international publications

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