نتایج جستجو برای: river valley landscape

تعداد نتایج: 173158  

2007
Don McKay

The waters of the modern Illinois River flow gently through looping meanders bordered by quiet backwater lakes and drop only a few inches in each river mile. Concealed beneath this gentle river is geologic evidence that the Illinois descended from ancient rivers with surprising and sometimes violent histories. The geologic story of the Illinois River is not only an account of an interesting cha...

2015
FAISAL A. ALQAHTANI

Understanding the stratigraphic fill and reconstructing the palaeo-hydrology of incised valleys can help to constrain those factors that controlled their origin, evolution and regional significance. This condition is addressed through the analysis of a large (up to 18 km wide by 80 m deep) and exceptionally well-imaged Late Pleistocene incised valley from the Sunda Shelf (South China Sea) based...

Journal: :Geomorphology 2021

Connecting geologically mapped data to numerical modelling can help in understanding river landscape evolution. This study focuses on flood-induced breaching of the coversand ridge IJssel valley floodplain (Rhine delta, Netherlands). The development breach would explain why this branch came into existence early medieval times. Prior breaching, formed a barrier for Rhine River discharge towards ...

Journal: :Geologija 2021

In tectonically active mountain ranges, the landscape is shaped by interplay of erosion/sedimentation and driven crustal deformation. Characteristic landforms such as moraines, wind gaps, fault scarps, river terraces can be used to decipher evolution. However, available data often allow for different interpretations. Here we study Pradol (Pradolino) Valley in Western Slovenia, a deeply incised ...

Journal: :Environmental toxicology and chemistry 2010
Joseph L Domagalski Donald P Weston Minghua Zhang Michelle Hladik

Pyrethroid insecticide use in California, USA, is growing, and there is a need to understand the fate of these compounds in the environment. Concentrations and toxicity were assessed in streambed sediment of the San Joaquin Valley of California, one of the most productive agricultural regions of the United States. Concentrations were also measured in the suspended sediment associated with irrig...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2013
Victor R Baker

The windings of rivers have long fascinated their human observers. For example, Aboriginal legend explains the sinuous pattern of the modern Finke River (Fig. 1) as the creation of the immense and powerful Rainbow Serpent as he emerged during the Dreamtime from deep waterholes. Recently in PNAS (1), a new theory for the general origin of such sinuous flow patterns was published, which follows f...

2017
Mason Owen Murphy

OF THESIS POPULATION GENETIC STRUCTURE OF NECTURUS MACULOSUS IN CENTRAL AND EASTERN KENTUCKY Population structure is influenced by extrinsic factors, such as landscape architecture and dispersal barriers. Lotic network architecture is known to constrain ecological, demographic and evolutionary processes, including population genetic structure. I assessed the population structure of a widespread...

2015
Diane De Steven Stephen P. Faulkner Bobby D. Keeland Michael J. Baldwin John W. McCoy Steven C. Hughes

In the Mississippi River Alluvial Valley (MAV), complete alteration of river-floodplain hydrology allowed for widespread conversion of forested bottomlands to intensive agriculture, resulting in nearly 80% forest loss. Governmental programs have attempted to restore forest habitat and functions within this altered landscape by the methods of tree planting (afforestation) and local hydrologic en...

Journal: :international journal of architecture and urban development 0
shahindokht barghjelveh nima sayad

ecological destruction in human-dominated landscapes has significant impacts on environment sustainability internationally. landscape planning can play a role in mitigating the effects of human-related activities. one element of landscape planning involves the analysis of the biological, spatial and social arrangement of areas in an urban environment and identifying characteristics that are und...

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