نتایج جستجو برای: river valleys

تعداد نتایج: 87038  

2017
Jacob V E Katz Carson Jeffres J Louise Conrad Ted R Sommer Joshua Martinez Steve Brumbaugh Nicholas Corline Peter B Moyle

When inundated by floodwaters, river floodplains provide critical habitat for many species of fish and wildlife, but many river valleys have been extensively leveed and floodplain wetlands drained for flood control and agriculture. In the Central Valley of California, USA, where less than 5% of floodplain wetland habitats remain, a critical conservation question is how can farmland occupying th...

2012
James R. Zimbelman Steven H. Williams

Remote sensing and field evidence are used to describe sand deposits found in associated pathways of emplacement in the eastern Mojave Desert. Two separate pathways are identified here: one extending eastward from the Bristol Playa through the Cadiz and Danby Playas and Rice Valley to the Colorado River, and a second parallel path extending eastward from Dale Playa through the Palen and Ford Pl...

2013
Xinzeng Wei Hongjie Meng Mingxi Jiang

We used landscape genetics and statistical models to test how landscape features influence connectivity or create barriers to dispersal for a mountain riparian tree species, Euptelea pleiospermum. Young leaves from 1078 individuals belonging to 36 populations at elevations of 900-2000 m along upper reaches of four rivers were genotyped using eight nuclear microsatellite markers. We found no evi...

The number of Neolithic sites in Fars greatly increases in the pottery Neolithic period. How this pattern indicates the high capability of pottery Neolithic period of Fars is not clear yet. Even though a definite path to the growth of indices of Neolithic settlement patterns in Fars during the seventh and sixth millennium B.C. has been recommended which may indeed be true, for this period we ca...

Journal: :Geological Magazine 1924

Journal: :Starinar 2021

Alleged ?Aegean migrations? have long been seen as underlying major transformations in lifeways and identity the Balkans 12th-11th centuries BC. Revisiting material culture settlement changes north-south ?routeway? of Velika Morava-Juzna Morava-Vardar/Axios river valleys, this paper evaluates developments within local communities. It is argued that mobility played an important role social chang...

Journal: :Landscape and Urban Planning 2021

• An integrated regional spatial planning approach for river ecosystems is presented. Conservation goals and ecosystem services were combined in . Mountain areas identified as key protection of habitats. Riparian forest restoration valleys can benefit habitats soil erosion The fosters articulation between nature water directives goals.

Journal: :محیط شناسی 0
هما ایرانی بهبهانی دانشیار، گروه مهندسی طراحی محیط دانشکدة محیط زیست، دانشگاه تهران شهرزاد فریادی دانشیار، گروه مهندسی برنامه ریزی و مدیریت محیط زیست دانشکدة محیط زیست، دانشگاه تهران گلنار محبعلی کارشناس ارشد مهندسی طراحی محیط، دانشکده محیط زیست، دانشگاه تهران

intra- city natural structures have an important role in developing city qualities and the promotion of its aesthetic, ecological and social values which also allow people to have their recreational activities. as tehran river-valleys have been damaged according to users’ behaviors and irregular constructions, the present paper aims to identify the typical behavioral characters of tourists in d...

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