1. Mapping Irrigated Areas of the World @ the End of Last Millennium and The Beginning of this Millennium using Multi-Scale Time-Series Satellite Sensor Data Prasad Thenkabail, Chandrashekkar Biradar, Hugh Turral, and Mitch Schull IWMI Irrigated Area Map of the World Version 1.0 (upcoming) 1982-1985 1996-1999 2001-2002 Krishna basin Ganges basin

2. Mapping Irrigated Areas of the World Overarching Goals 1.Map Irrigated Areas of the World @ 1 to 10-km scale 2.Map Irrigated areas of selected River Basins @ 500-m scale IWMI Irrigated Area Map of the World Version Beta (upcoming) Annual Rainfall <36 cm In Segments Ganges IWMIGanges Kassel/FAO

3. Key Achievements and Knowledge Generation http://www.iwmidsp.org/

4. Mapping Irrigated Areas of the World @ IWMI Key Achievements 1.Global irrigated area maps and characteristics Version 1.0 of IWMI (release November end, 2004) 1-10 km resolution Characteristics of irrigated area classes 2. River basin Irrigated area maps and characteristics of IWMI (available online: www.iwmidsp.org ) 500m -10-km resolution Ganges and Krishna basins Accuracy assessments Comparisons with USGS, GLC, National Census, and kassel 3.Advanced methods and techniques A number of advanced innovative methods and techniques (e.g., hyperspectral, quantitative spectral matching) used will be discussed in 3-4 papers in pipeline for year 2005. 4.Online access to IWMI’s Data and Knowledge on irrigated areas Primary data used in the project is made available globally through online access Irrigated area maps and characteristics made available globally through online access

5. IWMI Irrigated Area Map of the World Version 1.0 (upcoming) Only irrigated area shown above; de-highlighting all other classes shown below Irrigated Areas @ 1- 10 km Snap-shot of Irrigated Areas @ 150-m Zoom into Irrigated Areas @ 150-m

6. Very Slow: 10fps AVHRR NDVI, Monthly, 1997-1999AVHRR NDVI, Monthly, 1982-1985 Dynamic Irrigated Area Maps and Characteristics Example: Krishna River Basin

7. How Does it Compare with Others? http://www.iwmidsp.org/

8. Irri: Rice, sugarcane Irri: Other crops, fallow Irri: Water logged crop Irri: Rice with wetlands Irri: Rice & other crops Global Map of Irrigated Areas (.5 degree, Kassel / FAO, 2001) Global Map of Irrigated Areas, Indo-Ganges (500m, IWMI, 2004) 500-m MODIS 50-km Digitized from maps, various sources from Nations 33.1 Mha Irrigated 31.2 Mha Irrigated Total study area: 133 Mha Note: 12.3 Mha rainfed + supplemental Irri. (not in image)

9. Percent Irrigated: < 0.1 or null Irrigated: Other crops Irrigated: Rice/Sugarcane Irrigated Area Map (Kassel/FAO)Irrigated Area Map (IWMI) Landsat Geocover 2000 image Differences in Irrigated Area Mapping Kassel IWMI Truth

10. Ganges River Basin Irrigated Areas from Different RS Studies Ganges-Classification Irrigated area deviation from this study (also includes rainfed with suppl.) USGS (1992-1993) 32,255,630 (ha) 16.6 (%) less than ours GLC (2000) 56,466,954 (ha) 33.4 (%) more than ours IWMI (2001-2002) 37,602,567 (ha) This study (irrigated + supplemental) IWMI (2001-2002) 26,873,934 (ha) This study (irrigated pure) USGS (1993) GLC (2000) IWMI (2004) GLC has 2 irrigated area classes class 32 and 33. Class 33 in actual is a mix of rainfed and supplemental. Change in a decade is 16.6 % additional area (taking IWMI irrigated + supplemental). Just look in Ganges area

11. Mapping Irrigated Areas of the World IWMI vs. Others SourceLevelScale or resolutionSpatial MapRemarks 1.0Irrigated Area Mapping IWMI (2004-05)Global1-10 kmyesWork in progress. Multi scale satellite sensor data, temporal, DEM, rainfall, and other secondary datasets River basins500-myesMODIS data for Krishna and Ganges Kassel/FAOGlobal50-kmYesNational Statistics and Maps 2.0LULC Mapping ( deriving “rough estimates” of irrigated areas from indirect means ) FAOGlobalvariousNoFrom National census datasets GLC2000Global1-kmyesSPOT Vegetation data @ 1-km USGS (1992-93)Global1-kmyesAVHRR 1992-93 data 3.0National Efforts ( Note: has gone into Kassel/FAO effort ) Individual CountriesNationalvariousNoNational census data IWMI Irrigated Area Mapping Advances: (a) first RS/GIS based work @ Global level (thereby consistent set of indicators for entire World), (b) the best spatial scale so far from any sources @ Global level, and (c) in methods and techniques.

12. Use of Irrigated area Information http://www.iwmidsp.org/

13. Mapping Irrigated Areas of the World Use Data and Knowledge a. Area irrigated b. Spatial distribution of irrigated c. Dominant crops in each irrigated classes d. Intensity of irrigation (% irri. in a pixel) for each month e. Characteristics of irrigated classes a. Green up b. Green peak c. Amplitude d. Magnitude e. Biomass accumulation f. single, double, continuous cropping 2.Inputs to Global models 1. GPG, CP, IWMI researcher a. filling information gap b. providing consistent information c. Mapping baseline conditions 3.Capacity for other Global work @ IWMI a. Wetlands of the World b. GW studies in the region c. Water productivity estimations in river basins

14. Where do we go from here? http://www.iwmidsp.org/

15. Mapping Irrigated Areas of the World Where do We Go From Here 1.Global irrigated area map of the World @ 1-10 km Version 2.0 Evaluations and consultations on version 1.0 Improvements to version 1.0, release of version 2.0 (e.g., major crop groups) Comprehensive characteristics of irrigated area classes (e.g., irrigation intensity) Animations and behavior of irrigated areas over time and space Accuracy assessment Comparison with National statistics and/or with other studies and/or ground truth Wide dissemination 2. Global irrigated area mapping @ 30 to 150-m scale 2005 completion and release of version 1.0 2006 write up and release of version 2.0 ………………Budget for 2005 is 275k including staff time (1 full time RS expert, 2 part time RS experts, 1 senior researcher for 6 months, 1 month of principal scientist, data, software, hardware); 2006 the budget will be 200k. 3.Online access to IWMI’s Data and Knowledge on irrigated areas

16. Questions and Discussions