Your search found 51 records
(Location: IWMI HQ Call no: e-copy only Record No: H043775)
(0.27 MB)
Despite international calls for data and information sharing in transboundary waters and basin-specific evidence of its importance to cooperative management, no systematic research has been undertaken to answer questions of where, how frequently, and which water resources data and information are exchanged. This paper examines all available transboundary water agreements signed between 1900 and 2007 to determine the degree to which water resources data and information is exchanged in the world’s regions, how the level of exchange has developed over time, and the different ways in which data and information sharing has been codified in practice. In doing so, we reveal important trends regarding the mechanisms, types, and frequencies of water resources data and information sharing—as well as differences across temporal and spatial scales, by treaty type and function, and regime type. The results indicate that data and information exchange as already practiced is more nuanced and, in some senses, widespread than may commonly be recognized. Further, the results reveal key linkages between democracy and data and information exchange and provide a basis to test analogous linkages related to data sharing and other variables in transboundary water settings.
(Location: IWMI HQ Call no: 333.91 G592 MCV Record No: H044213)
(7.21 MB) (7.21MB)
3 Russell, M. A. 2008. Dojo: the definitive guide. Sebastopol, CA, USA: O'Reilly Media Inc. 451p.
(Location: IWMI HQ Call no: 001.6425 G000 RUS Record No: H044380)
(0.53 MB)
4 Bandara, K. M. P. S. 1998. Water needs and water use of agro-ecosystems in the Kirindi Oya Watershed, Sri Lanka: a remote sensing approach. MSc thesis. Enschede, Netherlands: ITC. 51p.
(Location: IWMI HQ Call no: 333.91 G744 BAN Record No: H044403)
(0.28 MB)
5 Karimi, Poolad; Molden, David; Bastiaanssen, W. 2011. Mapping crop water productivity in the Nile Basin through combined use of remote sensing and census data. In ICID. 21st Congress on Irrigation and Drainage: Water Productivity towards Food Security, Tehran, Iran, 15-23 October 2011. New Delhi, India: ICID. pp.137-148. (ICID Transaction No. 30-A)
(Location: IWMI HQ Call no: e-copy only Record No: H044424)
(1.24 MB) (2.22MB)
Remote sensed imagery in combination with secondary agricultural statistic was used to map crop water productivity (WP) in the Nile River Basin. Land productivity and crop tandardized gross value production (SGVP) were calculated at administrative level using the agricultural census data. Actual evapotranspiration (Eta) generated from remote sensing was used to assess crops consumptive water use. WP was then calculated by dividing SGVP by Eta in the cropped areas. Results show land productivity has a huge variation across the basin. SGVP per hectare in the basin varies from 20 $/ha to 1833 $/ha. Likewise SGVP, water productivity in the basin is highly variable. It ranges from 0.01 $/m3 to 0.2 $/m3. Observed patterns in the water productivity indicate that WP differences in the Nile basin are highly related to crop yield, which varies in different regions and also in irrigated and rainfed systems. Similarly, overall low WP is because of low yields, chiefly rainfed agriculture. This indicates that there is scope for enhancing WP in the Nile Basin through expanding irrigated agriculture and generally increasing yield.
6 Abdel Al, F.; Skold, M. 1982. Farm record summary and analysis for study cases at Abyuha, Mansuriya and Abu Raya Sites. Cairo, Egypt: Egypt Water Use and Management Project. 104p. (Egypt Water Use and Management Project Technical Report No.23)
(Location: IWMI-HQ Call no: 630 G232 ABD Record No: H044484)
(0.25 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H044487)
(3.68 MB)
Successful identification and mapping of different cropping patterns under cloudy conditions of a specific crop through remote sensing provides important baseline information for planning and monitoring. In Vietnam, this information is either missing or unavailable; several ongoing projects studying options with radar to avoid earth observation problems caused by the prevailing cloudy conditions have to date produced only partial successes. In this research, optical hyper-temporal Satellite Pour l’Observation de la Terre (SPOT) VEGETATION (SPOT VGT) data (1998–2008) were used to describe and map variability in irrigated rice cropping patterns of the Mekong delta. Divergence statistics were used to evaluate signature separabilities of normalized difference vegetation index (NDVI) classes generated from the iterative self-organizing data analysis technique algorithm (ISODATA) classification of 10-day SPOT NDVI image series. Based on this evaluation, a map with 77 classes was selected. Out of these 77 mapped classes, 26 lasses with prior knowledge that they represent rice were selected to design the sampling scheme for fieldwork and for crop calendar characterization. Using the collected information of 112 farmers’ fields belonging to the 26 selected classes, the map produced provides highly accurate information on rice cropping patterns (94% overall accuracy, 0.93 Kappa coefficient). We found that the spatial distributions of the triple and the double rice cropping systems are highly related to the flooding regime from the Hau and Tien rivers. Areas that are highly vulnerable to flooding in the upper part and those that are saline in the north-western part of the delta mostly have a double rice cropping system, whilst areas in the central and the south-eastern parts mostly have a triple rice cropping system. In turn, the duration of flooding is highly correlated with the decision by farmers to cultivate shorter or longer duration rice varieties. The overall spatial variability mostly coincides with administrative units, indicating that crop pattern choices and water controlmeasures are locally synchronized. Water supply risks, soil acidity and salinity constraints and the anticipated highly fluctuating rice market prices all strongly influence specific farmers’ choices of rice varieties. These choices vary considerably annually, and therefore grown rice varieties are difficult to map. Our study demonstrates the high potential of optical hyper-temporal images, taken on a daily basis, to differentiate and map a high variety of irrigated rice cropping patterns and crop calendars at a high level of accuracy in spite of cloudy conditions.
(Location: IWMI HQ Call no: e-copy only Record No: H044623)
(0.65 MB) (683KB)
This paper focuses on developing methods for both potential and actual evapotranspiration (ET) models for the data scarce conditions of the Eastern Arc Mountains catchment of Tanzania. For reliable estimation of the components of the hydrological cycle and plant water uptake, potential ET estimates are required, and for catchment water balance actual ET estimates are needed. These potential and actual ET estimates, however, depend on reliable and good quality data records. The study catchments in this work are characterised by general lack of reliable meteorological (MET) data, though good records of rainfall, flow and pan evaporation data do exist in a few places. In the study reported here the Penman-Monteith (P-M) estimates were found to be closer to the pan evaporation model in areas where reliable records of pan data exist. By comparison, estimates derived solely from temperature (i.e. the Standard Thornthwaite method), were a lot lower. Assuming the P-M estimates to be reliable, new temperature based regional equations were developed using data obtained from six climate stations. The study also presents simpler methods for estimating actual ET from catchments.
9 Yilmaz, K. K.; Yucel, I.; Gupta, H.V.; Wagener, T.; Yang, D.; Savenjie, H.; Neale, C.; Kunstmann, H.; Pomeroy, J. (Eds.) 2009. New approaches to hydrological prediction in data-sparse regions: proceedings of symposium HS.2 at the Joint Convention of the International Association of Hydrological Sciences (IAHS) and the International Association of Hydrogeologists (IAH), Hyderabad, India, 6-12 September 2009. Wallingford, UK: International Association of Hydrological Sciences (IAHS). 342p. (IAHS Publication 333)
(Location: IWMI HQ Call no: 551.48 G000 YIL Record No: H044653)
(0.44 MB)
10 Beven, K. J. 2012. Rainfall-runoff modelling: the primer. 2nd ed. Chichester, UK: John Wiley. 475p.
(Location: IWMI HQ Call no: 551.48 G000 BEV Record No: H044683)
(0.40 MB)
11 Chemin, Yann. (Ed.) 2012. Remote sensing of planet earth. Rijeka, Croatia: InTech. 240p.
(Location: IWMI HQ Call no: IWMI Record No: H044692)
(28.13 MB) (28.13MB)
12 Gonsalves, J.; Mohan, P. (Eds.) 2011. Strengthening resilience in post-disaster situations: stories, experience and lessons from South Asia. New Delhi, India: Academic Foundation; Ottawa, Canada: International Development Research Centre (IDRC). 799p.
(Location: IWMI HQ Call no: 363.346 G570 GON Record No: H044797)
(0.49 MB)
(Location: IWMI HQ Call no: IWMI Record No: H044977)
(1.36MB)
14 Siddiqui, Salman; Bharati, Luna; Pant, Menuka; Gurung, Pabitra; Rakhal, Biplov. 2012. Nepal: building climate resilience of watersheds in mountain eco-regions - climate change and vulnerability mapping in watersheds in middle and high mountains of Nepal. ADB Technical Assistance Consultant's Report for Department of Soil Conservation and Watershed Management (DSCWM), Government of Nepal. Kathmandu, Nepal: Asian Development Bank (ADB). 96p.
(Location: IWMI HQ Call no: e-copy only Record No: H045011)
(5.46 MB) (5.46MB)
Project Preparatory Technical Assistance 7883-NEP
(Location: IWMI HQ Call no: e-copy only Record No: H045039)
(1.65 MB)
This paper addresses a snow-mapping algorithm for the Tibetan Plateau region using Moderate Resolution Imaging Spectroradiometer (MODIS) data. Accounting for the effects of the atmosphere and terrain on the satellite observations at the top of the atmosphere (TOA), particularly in the rugged Tibetan Plateau region, the surface reflectance is retrieved from the TOA reflectance after atmospheric and topographic corrections. To reduce the effect of the misclassification of snow and cloud cover, a normalized difference cloud index (NDCI) model is proposed to discriminate snow/cloud pixels, separate from the MODIS cloud mask product MOD35. The MODIS land surface temperature (LST) product MOD11 L2 is also used to ensure better accuracy of the snow cover classification. Comparisons of the resulting snow cover with those estimated from high spatial-resolution Landsat ETM+ data and obtained from MODIS snow cover product MOD10 L2 for the Mount Everest region for different seasons in 2002, show that the MODIS snow cover product MOD10 L2 overestimates the snow cover with relative error ranging from 20.1% to 55.7%, whereas the proposed algorithm estimates the snow cover more accurately with relative error varying from 0.3% to 9.8%. Comparisons of the snow cover estimated with the proposed algorithm and those obtained from MOD10 L2 product with in situ measurements over the Hindu Kush-Himalayan (HKH) region for December 2003 and January 2004 (the snowy seasons) indicate that the proposed algorithm can map the snow cover more accurately with greater than 90% agreement.
(Location: IWMI HQ Call no: e-copy only Record No: H045165)
(10.58 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H045166)
(7.03 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H045167)
(6.07 MB)
19 Sahlu, D.; Pfeifer, Catherine; Abebe, Yenenesh; Omolo, A. 2011. Geographic information system: practical training manual for agricultural research centers. Bahir Dar, Ethiopia: Amhara Regional Agricultural Research Institute (ARARI); Addis Ababa, Ethiopia: International Water Management Institute (IWMI); Nairobi, Kenya: International Livestock Research Institute (ILRI) 98p.
(Location: IWMI HQ Call no: e-copy only Record No: H045181)
(4.17 MB)
(Location: IWMI HQ Call no: e-copy only Record No: H045196)
(3.16 MB) (3.16MB)
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