Download or read book Global irrigated area mapping Overview and recommendations written by Peter Droogers and published by IWMI Publications. This book was released on 2002 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This working paper gives an overview of the available global datasets on irrigated areas and an evaluation of their strengths and weaknesses. From these analyses an outline on how to develop a global irrigated area map, based on a generic methodology, is be presented. Some examples are given for the area covering India, Pakistan and Sri Lanka. These countries offer a broad range of irrigated areas in different environmental settings, ranging from deserts to humid tropics.
Download or read book Global irrigated area mapping Overview and recommendations written by Droogers, P. and published by IWMI. This book was released on 2002 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication will give an overview of the available global datasets on irrigated areas and an evaluation of their strengths and weaknesses. From these analyses an outline on how to develop a global irrigated area map, based on a generic methodology, will be presented. Some examples will be given for the area covering India, Pakistan and Sri Lanka. These countries offer a broad range of irrigated areas in different environmental settings, ranging from deserts to humid tropics. This publication should be considered as a first attempt to develop such a generic methodology, rather than a presentation of actual results on the extent of irrigated areas.
Download or read book An Irrigated Area Map of the World 1999 Derived from Remote Sensing written by Prasad Srinivasa Thenkabail and published by IWMI. This book was released on 2006 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research report presents the results of a global analysis of multi-temporal time series at nominal 10 kilometer pixel resolution. Statistics of irrigation at country level are derived from these maps for different seasons and for the entire year (annualized) for the nominal year of 1999. Three methods of area abstraction are used and compared, and three methods of accuracy assessment are applied. The annualized irrigated areas of the world at the end of the last millennium were about 480 Mha of which there were 263 Mha for season 1, 176 Mha for season 2, and 41 Mha for continuous cropping. Of this, Asia alone accounts for 78 percent (375 Mha) with 59 percent from China and India. The country statistics are compared with FAO country-level statistics (see Annex I). The IWMI GIAM 10 km V2.0 map were tested based on 3 sources of independent data resulting in accuracies between 84 and 91 percent with errors of omission not exceeding 16 percent and errors of commission less than 21 percent. The total area available for irrigation (TAAI; the nearest equivalent to FAO’s equipped area) was 412 Mha.
Download or read book Remote Sensing of Global Croplands for Food Security written by Prasad Thenkabail and published by CRC Press. This book was released on 2009-06-24 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increases in populations have created an increasing demand for food crops while increases in demand for biofuels have created an increase in demand for fuel crops. What has not increased is the amount of croplands and their productivity. These and many other factors such as decreasing water resources in a changing climate have created a crisis like
Download or read book Mapping irrigated areas in the Limpopo Province South Africa written by Cai, Xueliang and published by International Water Management Institute (IWMI). This book was released on 2017-06-05 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the findings of a collaborative effort to map and assess irrigated areas in the Limpopo Province, South Africa. The study was conducted by the International Water Management Institute (IWMI) in collaboration with the Department of Agriculture, Forestry and Fisheries (DAFF) and the Limpopo Department of Agriculture and Rural Development (LDARD), as part of the DAFF-supported ‘Revitalization of irrigation in South Africa’ project. Based on a combination of Landsat and Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data, previous irrigated area mapping exercises carried out by DAFF and three-field ground truthing (GT) surveys, a total of 1.6 million hectares (Mha) of cropland were identified, with 262,000 ha actually irrigated in the 2015 winter season. The study also found that only 29% of all land equipped with center pivots was actually irrigated.
Download or read book Mapping irrigated and rainfed agriculture in Ethiopia 2015 2016 using remote sensing methods written by Chandrasekharan, Kiran M. and published by International Water Management Institute (IWMI). This book was released on 2021-12-20 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Soils of the USA written by L.T. West and published by Springer. This book was released on 2016-09-19 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overview of the distribution, properties, and function of soils in the U.S., including Alaska, Hawaii, and its Caribbean territories. It discusses the history of soil surveys and pedological research in the U.S., and offers general descriptions of the country’s climate, geology and geomorphology. For each Land Resource Region (LRR) – a geographic/ecological region of the country characterized by its own climate, geology, landscapes, soils, and agricultural practices – there is a chapter with details of the climate, geology, geomorphology, pre-settlement and current vegetation, and land use, as well as the distribution and properties of major soils including their genesis, classification, and management challenges. The final chapters address topics such as soils and humans, and the future challenges for soil science and soil surveys in the U.S. Maps of soil distribution, pedon descriptions, profile images, and tables of properties are included throughout the text.
Download or read book A Digital Global Map of Irrigated Areas written by Stefan Siebert and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Developing and Testing a Greenness duration Method for Mapping Irrigated Areas written by Blaine C. Dawson and published by . This book was released on 2014 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Climate change has raised concerns about the interplay between agricultural productivity, water demand, and water availability in semi-arid to arid regions of the world. As these regions cover nearly 41% of the Earth's surface and are home to more than 38% of the total global population of 6.5 billion, it is important to understand the implications of changes to water use and water availability on the civilizations and industries that rely upon already scarce water resources. Currently, irrigated agriculture is the dominant water user in these regions and is estimated to consume approximately 80% of the world's diverted freshwater resources. Future climate change is anticipated to produce increased variability in precipitation, including a reduction in winter snowfall in areas such as the Snake River Basin of Southern Idaho. It is therefore important to discern how irrigated land-use (water use) is changing on an annual basis to improve water management practices and to be able to deduce factors (both natural and social) leading to changes in practices. Current methods for mapping irrigated land-use either lack sufficient accuracy or are time intensive, costly practices. This study aims to create an improved irrigated land-use mapping technique using remote sensing observations, which could not only reduce data processing time and cost, but also increase the temporal resolution at which irrigated areas are monitored. Using USDA Census of Agriculture county-scale irrigated area data from 2002 and 2007 as validation, our model was able to produce area-weighted average percent errors for the study region of 2.73% and 6.29%, respectively. When considering classification error at a regional scale, this is an improvement on the results from the widely accepted method of using single date imagery to classify irrigated land-use, which produced area-weighted average percent errors for the study region of 33.46% and 36.71%, respectively. Individual county correctness varied on an annual basis, with the accuracy being a direct correlation to the quantity and accuracy of observation locations chosen. Increasing the quantity of observation locations within each county should reduce the effect of observation point classification uncertainty on model accuracy, hopefully leading to improvements in water use accounting and helping advance understanding on the impacts of changes to irrigated land-use towards food security, economic effects, and environmental impacts."--Boise State University ScholarWorks.
Download or read book Remote Sensing for Environmental Monitoring GIS Applications and Geology written by and published by . This book was released on 2003 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reengaging in Agricultural Water Management written by World Bank and published by World Bank Publications. This book was released on 2006 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to face the challenge of disappointing returns on public investment in irrigation and drainage new solutions have emerged. These solutions are based on widely available technology and new management and governance options. The main message of "Reengaging in Agricultural Water Management" is that the irrigation and drainage sector should not continue to be dealt with as a stand-alone sector, but should be integrated into a broader perspective, one that embraces the objectives of productivity growth, poverty reduction, natural resources management and environmental protection.
Download or read book Anthropogenic Aquifer Recharge written by Robert G. Maliva and published by Springer. This book was released on 2019-05-07 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book is an overview of the diversity of anthropogenic aquifer recharge (AAR) techniques that use aquifers to store and treat water. It focusses on the processes and the hydrogeological and geochemical factors that affect their performance. This book is written from an applied perspective with a focus of taking advantage of global historical experiences, both positive and negative, as a guide to future implementation. Most AAR techniques are now mature technologies in that they have been employed for some time, their scientific background is well understood, and their initial operational challenges and associated solutions have been identified. However, opportunities exist for improved implementation and some recently employed and potential future innovations are presented. AAR which includes managed aquifer recharge (MAR) is a very important area of water resources management and there is no recent books that specifically and comprehensively addresses the subject.
Download or read book Mapping System and Services for Pressurized irrigation systems MASSPRES written by Lamaddalena, N. and published by Food & Agriculture Org. [Author] [Author]. This book was released on 2024-05-22 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: FAO's Irrigation and Drainage Paper No. [Author] 63 introduced the MASSCOTE methodology in 2007, tailored for modernizing large-scale canal irrigation systems. [Author] With global interest shifting towards pressurized pipe systems, particularly in water-scarce regions, the need for a similar methodology became apparent. [Author] Pressurized systems offer advantages like on-demand irrigation, reduced water wastage, and environmental impact. [Author] However, they require complex management due to changing water demands. [Author] To address this, FAO developed the MASSPRES approach, building on MASSCOTE's principles. [Author] MASSPRES aims to assess and enhance the performance of pressurized irrigation schemes, introducing steps like the Rapid Appraisal Procedure (RAP) for system mapping. [Author] It offers innovative methods for evaluating pressures and discharges at farm hydrants under various operating conditions, replacing earlier statistical analysis approaches. [Author] MASSPRES incorporates indicators for capacity, reliability, distribution equity, sensitivity to change, and perturbation risks into user-friendly software. [Author] Practical examples from Egypt, Italy, Spain, and Tunisia showcase its effectiveness. [Author] As governments seek to improve water and food production amidst increasing water scarcity, adopting technologies like pressurized irrigation becomes crucial. [Author] MASSPRES provides a systematic framework for both upgrading existing systems and designing future ones, addressing the complexities of managing pressurized irrigation efficiently. [Author]
Download or read book Comprehensive Remote Sensing written by Shunlin Liang and published by Elsevier. This book was released on 2017-11-08 with total page 3183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Comprehensive Remote Sensing, Nine Volume Set covers all aspects of the topic, with each volume edited by well-known scientists and contributed to by frontier researchers. It is a comprehensive resource that will benefit both students and researchers who want to further their understanding in this discipline. The field of remote sensing has quadrupled in size in the past two decades, and increasingly draws in individuals working in a diverse set of disciplines ranging from geographers, oceanographers, and meteorologists, to physicists and computer scientists. Researchers from a variety of backgrounds are now accessing remote sensing data, creating an urgent need for a one-stop reference work that can comprehensively document the development of remote sensing, from the basic principles, modeling and practical algorithms, to various applications. Fully comprehensive coverage of this rapidly growing discipline, giving readers a detailed overview of all aspects of Remote Sensing principles and applications Contains ‘Layered content’, with each article beginning with the basics and then moving on to more complex concepts Ideal for advanced undergraduates and academic researchers Includes case studies that illustrate the practical application of remote sensing principles, further enhancing understanding
Download or read book Classification Methods for Remotely Sensed Data written by Paul Mather and published by CRC Press. This book was released on 2001-12-06 with total page 358 pages. Available in PDF, EPUB and Kindle. Book excerpt: Remote sensing is an integral part of geography, GIS and cartography, used by academics in the field and professionals in all sorts of occupations. The 1990s saw the development of a range of new methods of classifying remote sensing images and data, both optical imaging and microwave imaging. This comprehensive survey of the various techniques pul
Download or read book Land Use Cover Datasets and Validation Tools written by David García-Álvarez and published by Springer Nature. This book was released on 2022-06-16 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book represents a comprehensive review of available land-use cover data and techniques to validate and analyze this type of spatial information. The book provides the basic theory needed to understand the progress of LUCC mapping/modeling validation practice. It makes accessible to any interested user most of the research community's methods and techniques to validate LUC maps and models. Besides, this book is enriched with practical exercises to be applied with QGIS. The book includes a description of relevant global and supra-national LUC datasets currently available. Finally, the book provides the user with all the information required to manage and download these datasets.
Download or read book Sustainable Irrigation Development in the White Volta sub Basin written by Eric Antwi Ofosu and published by CRC Press. This book was released on 2011-12-16 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sub-Saharan Africa has an irrigation potential of about 42 million hectares of which only 17% is developed. Despite several investments in irrigation the growth is slow. This study aims at helping to achieve sustainable irrigation in sub-Saharan Africa, through gaining a better understanding of productive irrigation water use and effective manageme
