نتایج جستجو برای: arid area therefore

تعداد نتایج: 1171562  

2015
Majed Ibrahim Barbara Koch

Groundwater is the main source of water supply in Jordan. Due to lower precipitation rates in recent years, the surface water is increasingly limited. Research on groundwater vulnerability helps protect this main source of water supply and assists in the development of plans to confront the deterioration and contamination of aquifers from wastewater and agricultural activities in order to prote...

2015

Expansive soils are often encountered in many parts of the world, especially in arid and semi-arid fields. Such kind of soils, generally including active clay minerals in low water content, enlarge in volume by absorbing the water through the surface and cause a great harm to the light structures such as channel coating, roads and airports. The expansive soils were encountered on the path of Ap...

Journal: :Remote Sensing 2017
Yuqiu Jia Lina Tang Lin Wang

Estimation of impervious surface area is important to the study of urban environments and social development, but surface characteristics, as well as the temporal, spectral, and spatial resolutions of remote sensing images, influence the estimation accuracy. To investigate the effects of regional environmental characteristics on the estimation of impervious surface area, we divided China into s...

Journal: :The Science of the total environment 2014
José M Fernández M Aurora Nieto Esther G López-de-Sá Gabriel Gascó Ana Méndez César Plaza

Semi-arid soils cover a significant area of Earth's land surface and typically contain large amounts of inorganic C. Determining the effects of biochar additions on CO2 emissions from semi-arid soils is therefore essential for evaluating the potential of biochar as a climate change mitigation strategy. Here, we measured the CO2 that evolved from semi-arid calcareous soils amended with biochar a...

Journal: :Environmental Modelling and Software 2011
Yueh-Hsin Lo Juan Blanco Brad Seely Clive Welham James P. Kimmins

 We tested the weather extrapolator MTCLIM for three sites in an arid region.  We provided a detailed validation of MTCLIM with statistical and graphical analysis.  MTCLIM acceptably extrapolates temperatures even from short weather data series.  MTCLIM performance for precipitation is acceptable only for monthly values.  MTCLIM creates acceptable weather records if high daily accuracy is ...

Introduction: Rangelands constitute almost 52 percent of the country area computed as 164 million ha. The extent of rangelands has been estimated 84 million ha in Iran and they have been classified as good, moderate to poor and poor to very poor ones ranged as almost 10, 42 and 48 percent, respectively. One of the fundamental problems concerning land uses of rangelands is that Rangeland are not...

Journal: :Remote Sensing 2023

Machine learning (ML)-based models are popular for complex physical system simulation and prediction. Lake is the important indicator in arid semi-arid areas, to achieve proper management of water resources a lake basin, it crucial estimate predict dynamics, based on hydro-meteorological variations anthropogenic disturbances. This task particularly challenging regions, where scarcity poses sign...

2012
M. R. Mustapha H. S. Lim M. Z. MatJafri

Arid environment is a dry landscape or region that received an extremely low amount of precipitation. Arid areas are located where vegetation cover is sparse to almost nonexistent. Almost one third of earth land surface is arid or desert. Over desert areas, a number of land cover patterns can be observed. One example is given here for the Arabian Peninsula. The located area can be found in Fig....

Journal: :desert 2008
a. a. shamsipour s. k. alavipanah h. mohammadi a. azizi f. khoshakhlagh

drought is a major problematic phenomenon for the mostly semi-arid country of iran. the north centralregions of iran (north of esfahan and ghom province) have suffered from severe droughts several times duringthe last three decades. the frequent occurrence of drought in these regions is due to low and inconsistentprecipitation, abnormally high temperatures, increases in surface albedo and evapo...

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