Development and validation of the global map of irrigation areas
نویسندگان
چکیده
A new version of a digital global map of irrigation areas was developed by combining irrigation statistics for 10 825 sub-national statistical units and geo-spatial information on the location and extent of irrigation schemes. The map shows the percentage of each 5 arc minute by 5 arc minute cell that was equipped for irrigation around the year 2000. It is thus an important data set for global studies related to water and land use. This paper describes the data set and the mapping methodology and gives, for the first time, an estimate of the map quality at the scale of countries, world regions and the globe. Two indicators of map quality were developed for this purpose, and the map was compared to irrigated areas as derived from two remote sensing based global land cover inventories.
منابع مشابه
تغییرات زمانی و مکانی پارامترهای کیفی آبهای زیرزمینی با استفاده از روش زمینآماری کریجینگ (مطالعه موردی: دشت بهادران مهریز)
Groundwater is the most important source of water supply for agricultural purposes in arid and semi-arid areas. In many areas, excessive use of high quality water resources leads to reducing the available water resources and turning to the use of low quality water resources. Thus, knowing the temporal and spatial variation of groundwater quality is a necessary factor for implementation of sound...
متن کاملClassification map of the sensitivity of flooding using the method of assessment frequency and weight of evidence in the Kermanshah Province
Flood susceptibility mapping using frequency ratio and weight of evidence technique: a case study of Kermanshah Province abstract Flood is considered as one of the most destructive natural disasters worldwide, because of claiming a large number of lives and incurring extensive damage to the property, disrupting social fabric, paralyzing transportation systems, and threatening natural ecosy...
متن کاملGlobal Health: A Review of Concepts, Players, and Publications
Introduction: The increasing number of global health initiatives have contributed to improving access to health services and building knowledge platforms. However, the distribution of activities and knowledge produced has been uneven. To scope the scientific output in global health, publications from 2008-2017 were reviewed to identify major players, assess the extent of involv...
متن کاملAn Iranian Model of Desertification Potential Assessment for Sustainable Regional Development
Extended abstract 1-Introduction Desertification means land degradation in the arid, semi-arid and dry sub-humid regions because of natural or anthropogenic factors. Desertification is accounted as the third most important global challenge after the crisis of water shortage and drought in the 21st century. Desertification is a problem for many countries, especially the developing countries. I...
متن کاملPerformance comparison of land change modeling techniques for land use projection of arid watersheds
The change of land use/land cover has been known as an imperative force in environmental alteration, especially in arid and semi-arid areas. This research was mainly aimed to assess the validity of two major types of land change modeling techniques via a three dimensional approach in Birjand urban watershed located in an arid climatic region of Iran. Thus, a Markovian approach based on two suit...
متن کامل