نتایج جستجو برای: floodplain mapping

تعداد نتایج: 202052  

2005
Boyko Dodov Efi Foufoula-Georgiou

[1] This paper explores the links between channel/floodplain morphometry, streamflow variability, and sediment transport across a wide range of scales and frequencies of discharge. On the basis of extensive analysis of observations from a climatologically and geologically homogeneous region in the midwestern United States, we provide evidence that streamflow statistics are significantly affecte...

2003
WENDY BRYAN TROWBRIDGE

Recent work in riparian restoration has focused on the importance of restoration of physical processes. The assumption behind this is that if rivers are reconnected to their natural floodplain desired vegetation will quickly colonize. This dissertation consists of three studies conducted to test this assumption. The study site is series of former agricultural fields that were separated from the...

2013
Rodrigo Cauduro Dias de Paiva Diogo Costa Buarque Walter Collischonn Frédéric Frappart Stephane Calmant Carlos André Bulhões Mendes

22 23 In this paper, a hydrologic/hydrodynamic modelling of the Amazon River basin 24 is presented using the MGB-IPH model with a validation using remotely-sensed 25 observations. Moreover, the sources of model errors by means of the validation and 26 sensitivity tests are investigated and the physical functioning of the Amazon basin is 27 also explored. The MGB-IPH is a physically-based model ...

2008
E. A. Addink

Floodplains are among the most valuable ecosystems of the world. In the Netherlands they have a double function, serving both safety and nature, recreational purposes. Safety standards for flood protection of this densely populated country are the highest world-wide, protecting against events expected to occur with an annual probability of 1/10,000. Rivers in the Netherlands are all embanked by...

2015
Kristin Ludewig Tobias W. Donath Bianka Zelle R. Lutz Eckstein Eva Mosner Annette Otte Kai Jensen

BACKGROUND Floodplain meadows along rivers are semi-natural habitats and depend on regular land use. When used non-intensively, they offer suitable habitats for many plant species including rare ones. Floodplains are hydrologically dynamic ecosystems with both periods of flooding and of dry conditions. In German floodplains, dry periods may increase due to reduced summer precipitation as projec...

2015
Johanna Jalonen Juha Järvelä Matti Vaaja Matti Kurkela Hannu Hyyppä Yong Wang

Detailed modeling of floodplain flows and associated processes requires data on mixed, heterogeneous vegetation at river reach scale, though the collection of vegetation data is typically limited in resolution or lack spatial information. This study investigates physically-based characterization of mixed floodplain vegetation by means of terrestrial laser scanning (TLS). The work aimed at devel...

2010
Daniel H. Mann Pamela Groves Richard E. Reanier Michael L. Kunz

We use the stratigraphy of floodplains on Alaska’s North Slope to describe how tundra watersheds responded to climate changes over the last 15,000 calibrated years BP (15 cal ka BP). Two episodes of extremely rapid floodplain alluviation occurred during the PleistoceneeHolocene transition, one between 14 and 12.8 cal ka BP and the other between 11.5 and 9.5 cal ka BP. These aggradation episodes...

2015
Christopher Hill Zhichun Jing Christopher L. Hill

The Late Quaternary geomorphology and stratigraphy of the Big Fork River valley, within the Rainy River basin of northern Minnesota, reveals evidence of prehistoric human interaction with late Holocene riverine environments. By 11000 14 C B.P., deglaciation made the region inhabitable by human groups using Clovis artifacts. Human habitation would also have been possible during the Moorhead low ...

Journal: :The Science of the total environment 2000
L D Hylander M Meili L J Oliveira E de Castro e Silva J R Guimarães D M Araujo R P Neves R Stachiw A J Barros G D Silva

Sediments from nine floodplain lakes in Pantanal were analyzed for a large-scale (300 km) survey of mercury (Hg) load in sediments and soils of the Alto Pantanal and to study the relationship between Hg and reactive aluminum, iron, and manganese oxy-hydroxides. The results were compared with the Hg content in river and stream sediments from the Poconé gold mining area, where Hg has been extensi...

2005
H. A. Wanas M. M. Abu El-Hassan

The Upper Cretaceous/Lower Tertiary Maghra El-Bahari Formation at Gabal Ataqa and Gabal Shabrawet in the northeastern portion of the Eastern Desert of Egypt is subdivided into two informal lithostratigraphic parts: lower and upper. The lower part has common features of alluvial floodplain-dominated deposits with occasional occurrences of crevasse splay deposits. The upper part has sediments typ...

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