نتایج جستجو برای: hydrological and ecological needs

تعداد نتایج: 16856274  

2017
Linlu Shi Yuyu Wang Yifei Jia Cai Lu Guangchun Lei Li Wen

Floodplain wetlands are valuable ecosystems for maintaining biodiversity, but are vulnerable to hydrological modification and climatic extremes. The floodplain wetlands in the middle Yangtze region are biodiversity hotspots, particularly important for wintering migratory waterbirds. In recent years, extremely low winter water level events frequently occurred in the middle Yangtze River. The hyd...

Soil moisture is an important variable in climatic, hydrological, and ecological systems that link atmospheric processes to the earth's surface. The rainfall systems of the water year 2017-2018 abnormally caused more than normal rainfall in Fars province and caused major changes in the surface moisture of the soil. The purpose of this research is to analyze the spatial changes of soil moisture ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم انسانی و اجتماعی 1389

today the image of a permanent skeletal space of cities affected by some forces or mechanisms is put in time with social-economic development and while imposes a new face and perspective to physical anatomy of cities, and prepares field to changes in content and social- economic structures of cities too. simultaneously with quitting villages in order to settle in cities by villagers, the phen...

Journal: :Brazilian journal of biology = Revista brasleira de biologia 2011
C J R Alho

The Pantanal biome is characterised by seasonal flooding which determines specific ecosystem processes, with the occurrence of adapted plants and animals to the annual shrinking and expansion of habitats due to the seasonal hydrological regime. Biodiversity abundance varies during the dry and wet seasons. The Pantanal's biodiversity is a fundamental component of ecosystem services for human soc...

Journal: :محیط شناسی 0
فرزانه رزاقیان دانشجوی دکترای برنامه ریزی شهری، دانشگاه فردوسی مشهد، واحد بین الملل، عضو پژوهشی جهاد دانشگاهی مشهد محمد رحیم رهنما دانشیار دانشگاه فردوسی مشهد، مدیر گروه برنامه ریزی شهری جهاد دانشگاهی مشهد معصومه توانگر کارشناس ارشد برنامه ریزی شهری، مربی جهاد دانشگاهی مشهد حسین آقاجانی کارشناس ارشد برنامه ریزی شهری، مربی جهاد دانشگاهی مشهد

the distinguishing characteristic in the third millennium is planning based on principles of sustainable development in line with nature and all activities related to urban issues. ecological concepts and consequently ecological park refers to a comprehensive and integrated set of measures which create coordination, balance between the constituent elements of the park in order to establish sust...

2007
George Walker Peter K. Swart Courtney Drayer Amanda Waite Kateel Shetty

Management of Greater Everglades Ecosystems: The Joint Ecosystem Modeling Laboratory Laura Brandt, USFWS [email protected] Integrating Ecological and Hydrological Models for Adaptive Management of Greater Everglades Ecosystems: The Joint Ecosystem Modeling Laboratory Best, G.R., US Geological Survey Brandt, L.A., US Fish and Wildlife Service Mazzotti, F.J., University of Florida Adaptive man...

1999
N. LeRoy Poff Sezin Tokar Peggy Johnson

An artificial neural network (ANN) was used to evaluate the hydrological responses of two streams in the northeastern U.S. having different hydroclimatologies (rainfall and snow+rain) to hypothetical changes in precipitation and thermal regimes associated with climate change. For each stream, historic precipitation and temperature data were used as input to an ANN, which generated a synthetic d...

ذو نعمت کرمانی, محمد, گنجعلیخانی, معین,

     In many floods controlling, watershed-management and water-resources projects, estimating of river flow-rate is important and needs a comprehensive hydrological modeling of flow-rate evaluation. Need for enlightening the status of water-resources and precipitation in different watersheds and the lack of networks of hydro-meteorological gauging stations, reveal the importance of estimating ...

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