نتایج جستجو برای: different land uses

تعداد نتایج: 2050756  

Journal: :Forests 2022

In the Ethiopian highlands, clearance of Afromontane dry forest and conversion to crop grazing land lead degradation loss soil organic matter (SOM). Eucalyptus is often grown on degraded soils, this results in partial recovery carbon stocks. The aim work was assess biological sources SOM land-use sequence. top-soils (0–10 cm) four systems, namely remnant natural forest, eucalyptus plantation, c...

Journal: :ecopersia 0
vahed berdi sheikh associate prof. department of watershed and arid land management, gorgan university of agricultural science and natural resources, gorgan, iran masoud jafari shalamzari ph.d candidate, department of watershed and arid land management, gorgan university of agricultural science and natural resources, gorgan, iran asghar farajollahi ph.d candidate, department of watershed and arid land management, gorgan university of agricultural science and natural resources, gorgan, iran pouria fazli m.sc graduate, department of watershed and arid land management, gorgan university of agricultural science and natural resources, gorgan, iran

the runoff generation and soil erosion in the kechik watershed, golestan province, was assessed, using a designed and constructed portable rainfall simulator. treatments were applied on different land-uses, slopes and aspects as the most influential factors. results showed that land-use significantly affected runoff generation (13.35 l, 6.9 l, and 4.12 l, respectively for agriculture, forest an...

Journal: :journal of rangeland science 2014
farhad nourmohammadه taher fatollahه javad mirzaei karim soleimani mahmoud habibnejhad roshan

erosion is one of the important social-economic problems in iraniancatchments that have been posed by surface water vastness and runoff production. so, thestudy of water resources, soil erosion and effective factors is of high importance. gullyerosion also extends in many parts of iran and its study particularly in viewpoint ofsediment yield is therefore very important and should be taken into ...

The main purpose of this paper is to explain the factors affecting the change of service land uses in the city of Shiraz and identify its reasons. For this purpose, the second-order confirmatory factor analysis technique has been used as one of the structural equation modeling techniques to determine the severity of the effect of the four factors on land use change, through which a contributing...

Vulnerability of soil separates to detachment by water is described as soil erodibility by Universal Soil Loss Equation which can be affected by land use change. In this study it was attempted to quantify the changes of Universal Soil Loss Equation K-factor and its soil driving factors in three land uses including rangeland, rainfed farming, and orchards in Babolrood watershed, northern Iran. S...

2012
N. Lalande F. Cernesson M. G. Tournoud Nathalie Lalande Flavie Cernesson

The stream functioning is closely influenced by land uses, along the stream itself and throughout the catchment. Land uses can be seen as both the expression of the natural environment and the result of increasing human activities. Land uses generate various (in kind and intensity) pressures (positive or negative) that alter river water quality at different scales of time and space. The objecti...

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The Rivers most common sources of drinking water supply, agriculture and industry are considered as due to the different regions of admission and can pass and in direct contact with with its surroundings have many quality swings. The other hand, excessive exploitation of soil, continuous use of surface and underground water resources and sustainable use of agricultural chemicals (fertilizers an...

خواجوی, الیاس, شادفر, صمد, عرب خدری, محمود, مهدیان, محمدحسین,

  Soil erosion is a serious issue in Iran. Determining the rate of soil erosion in various regions could help for better understanding of the erosion condition and soil conservation planning as well. In accordance with this constraint, more than 840 measured values derived from Cs-137 method and experimental plots in 31 research sites countrywide were collected, and analyzed related to differen...

Journal: :journal of rangeland science 2013
masoud nasri alireza sarsangi hassan yeganeh

due to the increase of changes in the land uses mainly resulting from humaninterferences, monitoring the changes and evaluating their trend and environmental effectsfor future planning and management are essential. in the present study, an attempt is madeto observe the changes which had occurred in ardestan area during a period of 30 yearsusing some satellite images. different kinds of data for...

Journal: :جغرافیا و توسعه ناحیه ای 0
مشکینی مشکینی محمدپور محمدپور رحیمی رحیمی اکبرپور سراسکانرود اکبرپور سراسکانرود

urban green spaces are one of the most important services in modern cities and form a set of urban sustainable development factors which receive considerable attention from urban planners. this paper explains how land use can be optimally allocated to urban public green spaces. in this study, some of the factors influencing urban green spaces in a period from 1373 to 1384 were studied. moreover...

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