نتایج جستجو برای: coastal agriculture and land use

تعداد نتایج: 17020471  

Journal: :محیط زیست طبیعی 0
مهدی شیخ گودرزی دانشجوی کارشناسی ارشد محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران افشین علیزاده شعبانی استادیار محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، ایران عبدالرسول سلمان ماهینی دانشیار محیط زیست، دانشکده شیلات و محیط زیست، دانشگاه گرگان، ایران جهانگیر فقهی دانشیار جنگلداری، دانشکده منابع طبیعی، دانشگاه تهران، ایران

human activities induced changes in land cover/use have extensive impacts on the landscape. in recent years, these changes had an increasingly growth due to irrational use of the natural resources in iran. hence, considering the negative effects of the inappropriate use of land and land-use change, understanding of the landscape changes over time is necessary to planning and implementation of s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت دبیر شهید رجایی - دانشکده علوم انسانی و پایه 1390

the present study aimed at investigating the relationship between iranian efl teachers’ classroom management orientations and their teaching styles. additionally, the difference between male and female teachers’ teaching styles and classroom management orientations and their relationship with experience and age were explored. three hundred efl teachers filled in attitudes and beliefs on classro...

Journal: :محیط شناسی 0
حمیدرضا پورخباز استادیار گروه محیطزیست، دانشکدة منابع طبیعی دانشگاه صنعتی خاتمالانبیا بهبهان حسین اقدر دانشجوی کارشناسی ارشد سنجش از دور و gis، دانشکدة علوم دانشگاه شهید چمران اهواز فاطمه محمد یاری دانشجوی کارشناسی ارشد ارزیابی و آمایش سرزمین، دانشکدة منابع طبیعی دانشگاه صنعتی خاتمالانبیا بهبهان سعیده جوانمردی مربی گروه محیط زیست، دانشکدة منابع طبیعی دانشگاه صنعتی خاتم الانبیاء بهبهان

introduction   capability evaluation can be considered as a basic strategy for land use becausethe development synchronous with the naturecan be achieved by using identifying and assessing of the ecological characteristics of the area. agricultural land suitability classification based on indigenous knowledge is vital to land-use planning (ecological capacity evaluation). execution of developme...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2015
Christopher M Stevenson Cedric O Puleston Peter M Vitousek Oliver A Chadwick Sonia Haoa Thegn N Ladefoged

Many researchers believe that prehistoric Rapa Nui society collapsed because of centuries of unchecked population growth within a fragile environment. Recently, the notion of societal collapse has been questioned with the suggestion that extreme societal and demographic change occurred only after European contact in AD 1722. Establishing the veracity of demographic dynamics has been hindered by...

2009
Michelle E. Portman Di Jin Eric Thunberg

A major challenge in gauging long-term and cumulative impacts of fisheries management on coastal fishing communities is the lack of understanding of the interactions between changes in fish stocks and waterfront land uses. This study examines these interactions in the New Bedford/Fairhaven area using parcel level data and geographic information system (GIS) tools. Logistic regression models wer...

Population growth and the need for economic and social services have accelerated the demands for land and its manipulations over the recent decades. The contribution of policies and interventions of different stakeholders in land change is not adequately addressed in previous studies. This research, therefore, aims to examine the role of key stakeholders, and their policies in land-use change i...

Journal: :journal of agricultural science and technology 2014
h. r. pourkhabbaz s. javanmardi h. a. faraji sabokbar

suitability analysis is a prerequisite for sustainable agricultural production and it involves evaluation of the environmental parameters. the development and creation of appropriate points for this land use without considering environmental capability will result in the appearance of several ecological, economic, and social problems. the multi-criteria decision making (mcdm) models were used f...

2003
Amitrajeet A. Batabyal Dug Man Lee

In this paper we first construct a theoretical model of land use by swidden cultivators when these cultivators can choose whether to grow a cash crop or a food/subsistence crop. Second, we study the land quality accumulation decision faced by shifting cultivators and, in the process, we show how to compute the optimal length of time during which cleared land is to be left fallow. Finally, we in...

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