نتایج جستجو برای: land degradation and increasing yield per surface area unit supplicate to be inevitable optimal land utilizationso land evaluation

تعداد نتایج: 18720938  

ژورنال: علوم آب و خاک 2008
نادری خوراسگانی, مهدی , کریمی, احمد ,

  This research was carried out to study the impacts of geomorphologic characteristics of claypan on land use and land degradation. Databank of the study area was constructed and digital terrain model of claypan was prepared. By using GIS techniques spatial distributions of the subsurface drainage network, sediment transportation index and wetness index were calculated. The results indicate tha...

Journal: :محیط شناسی 0
غلامرضا یاوری دکترای اقتصاد کشاورزی استادیاردانشگاه پیام نور، گروه علمی اقتصاد کشاورزی محمد مهدی فاضل بیگی کارشناس ارشد توسعه روستایی، دانشگاه آزاد اسلامی- واحد علوم و تحقیقات، تهران

nowadays, environmental impact assessment (eia) is a one of planning tool that used for the prediction of environmental impacts. there are several methods to assess environmental impacts in the world. degradation model is one of the mathematics models that investigates and predicts data for assessing the impact of development. degradation model consist degradation coefficient per ecology unit, ...

Ahmad Pahlavanravi Einollah Rouhi Moghaddam, Khalil Amoozadeh

Objective: The aim of this study is to provide a management plan for the Sykan watershed of Darre shahr city located in Ilam province using GIS in land use planning. Methods: For land using of Sykan watershed of Ilam province with about 9 hectares area, map of classes, elevation, percent slope, geographical aspects, soil characteristics, vegetation density and the final map units were combined ...

2016
Gunwoo Kim Patrick Miller David Nowak

Using the City of Roanoke, Virginia as a study site, this paper quantifies the forest structure, ecosystem services and values of vacant and residential land. Single family residential land had more trees (1,683,000) than vacant land (210,000) due largely to the differences in land area (32.44 km2 of vacant land vs. 57.94 km2 residential). While the percentage of tree coverage was almost identi...

Journal: :جنگل و فرآورده های چوب 0
ناصر احمدی ثانی assistant professor, mahabad branch, islamic azad university ساسان بابایی کفاکی استادیار، گروه جنگلداری، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی اسدالله متاجی دانشیار، گروه جنگلداری، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی لیدا رزاق نیا کارشناس ارشد آبخیزداری

degradation of zagros forests has been continuing since a long time ago because of traditional and often improper exploitations due to poverty, unemployment, and livelihood. in this study, in order to reduce forest degradation and improve sustainability, the feasibility of multipurpose using of zagros forest was assessed in baneh forests by using gis, rs and ahp. all of the possible land-uses a...

2006

Despite the apparent abundance of land, agricultural land with a dependable growing period represents a fraction of the total land area in Ethiopia. Moreover, land degradation is extensive and severe, particularly in the highlands above 1500 meters above sea level, which account for about 40 percent of the total land area but home for 90 percent of the total population and 70 percent of livesto...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

Predicting land use change is an indispensable aspect in identifying the best development and management of land resources and their potential. This study used certified land-use maps of 1997, 2006, and 2015 combined with ancillary data such as road networks, water bodies and slopes, obtained from the Department of Agriculture and the Department of Surveying and Mapping in Malaysia, respectivel...

Parisa Alamdari Setareh Amanifar

In this study, qualitative land suitability evaluation was made for research station of East Azarbaijan, for tomato, potato, onion and bean. The study was done using Simple Limitation Method (SLM), Limitation Method regarding Number and Intensity (LMNI) and Parametric Methods (PM) such as the square root and the Storie methods. The results from different methods indicated that the most importan...

Journal: :محیط شناسی 0
جلال عبداللهی سید علی محمد چراغی محمدحسن رحیمیان

in this study, the environmental effects of land use changes on vegetation cover and emitted land surface temperature in two urban and non-urban areas of ardakan in yazd province, iran, were studied and compared temporally, using remote sensing technique. for this purpose, contemporary land sat satellite images in 1990 and 2002 were acquired and used. then vegetation cover maps were generated u...

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