scholarly journals Gis Approach Of Inundation Analysis In The Dongjiang(East River) Drainage Area

2012 ◽  
Vol 12 ◽  
pp. 1063-1070 ◽  
Author(s):  
Huaixiang Liu ◽  
Yongjun Lu ◽  
Zhaoyin Wang
Keyword(s):  
Drainage Area ◽  
River Drainage ◽  
East River

Postglacial Palynology and Archaeology in the Naknek River Drainage Area, Alaska

1963 ◽  
Vol 29 (1) ◽  
pp. 74-81 ◽  
Author(s):  
Calvin J. Heusser
Keyword(s):  
Snow Accumulation ◽  
Drainage Area ◽  
Alaska Peninsula ◽  
River Drainage ◽  
Pollen Diagrams ◽  
Heavy Snow

AbstractSamples were collected from four excavations and three muskegs for palynological examination in connection with a study of human prehistory in the Naknek drainage area, upper Alaska Peninsula. The purpose was to reconstruct the sequence of environments dating back to the earliest recognizable cultural phase, close to 4000 B.P. Pollen diagrams for muskeg show birch and alder as the principal arboreal types. Increasing percentages of alder occur during a late interval of hypsithermal time dating about 5500 B.P. Birch thereafter gained in proportion and between approximately 5000 and 2500 B.P. achieved maxima. Subsequently percentages of birch declined. Pollen spectra disclose that migration of spruce from the interior into this area took place within recent centuries. A climate cooler and drier than at present is interpreted from the diagrams to have been in effect during the earliest cultural phase and probably lasted until about 2500 B.P. Later, climate became slowly warmer and increasingly more humid. Temperature, however, was at first lower than at present and, coupled with greater precipitation, presumably caused heavy snow accumulation in the Aleutian Range which resulted in glacial advances during recent centuries.

scholarly journals Use of HAND terrain descriptor for estimating flood-prone areas in river basins

2021 ◽  
Vol 56 (3) ◽  
pp. 501-516
Author(s):  
Ana Alice Rodrigues Dantas ◽  
Adriano Rolim Paz
Keyword(s):  
River Basin ◽  
Flood Hazard ◽  
Mitigation Strategies ◽  
Drainage Area ◽  
Hazard Mapping ◽  
Morphological Pattern ◽  
River Drainage ◽  
Variable Approach ◽  
The Impact ◽  
Flooded Areas

The flood hazard mapping in a river basin is crucial for flooding risk management, mitigation strategies, and flood forecasting and warning systems, among other benefits. One approach for this mapping is based on the HAND (Height Above Nearest Drainage) terrain descriptor, directly derived from the Digital Elevation Model (DEM), in which each pixel represents the elevation difference of this point in relation to the river drainage network to which it is connected. Considering the Mamanguape river basin (3,522.7 km²; state of Paraíba, Brazil) as the study location, the present research applied this method and verified it as for five aspects: consideration of a spatially variable minimum drainage area for denoting the river drainage initiation; the impact of considering a depressionless DEM; evaluation of hydrostatic condition; effect of incorporating an existing river vector network; and comparative analysis of basin morphology regarding longitudinal river profiles. According to the results, adopting a uniform minimum drainage area for the river network initiation is a simplification that should be avoided, using a spatially variable approach, which influences the amount and spatial distribution of flooded areas. Additionally, considering the depressionless DEM leads to higher values of HAND and to a smaller flooded area (difference ranging between 3% and 99%), when compared with the use of DEM with depression, despite 3.1% of the pixels representing depressions. The use of the depressionless DEM is recommended, whereas the DEM pre-processing by incorporating a vector network (stream burning) generates dubious results regarding the relation between HAND and the morphological pattern presented in the DEM. Moreover, the estimation of flooded areas based on HAND does not guarantee the hydrostatic condition, but this disagreement comprises a negligible area for practical purposes.

Human waterborne parasites in zebra mussels (Dreissena polymorpha) from the Shannon River drainage area, Ireland

2004 ◽  
Vol 93 (5) ◽  
Author(s):  
ThaddeusK. Graczyk ◽  
DavidBruce Conn ◽  
Frances Lucy ◽  
Dan Minchin ◽  
Leena Tamang ◽  
...  
Keyword(s):  
Dreissena Polymorpha ◽  
Zebra Mussels ◽  
Drainage Area ◽  
River Drainage

scholarly journals Defining Land Use in a Context of Proximity: Politics of Community Recognition and Identity Dynamics in Washaw Sibi

1969 ◽  
Vol 60 (1) ◽  
pp. 76-89 ◽  
Author(s):  
David Lessard
Keyword(s):  
Land Use ◽  
Social Role ◽  
Drainage Area ◽  
Historical Overview ◽  
River Drainage ◽  
Group Identities ◽  
Ethnographic Data ◽  
Kinship Ties ◽  
The Way

In the mid-2000s, in the Upper Harricana River drainage area, the Abitibiwinni and Washaw Sibi groups may be said to have “overlapping claims.” This article presents a historical overview of the area, emphasising interactions between groups and the way group identities were arbitrarily assigned by colonisers and gradually associated with residence. Ethnographic data underlines how family hunting territories played a pivotal social role for the subsistence of marginalised families. The idea that the claims of these groups “overlap” emerged recently, despite documented historical forms of coexistence, kinship ties and hunting partnerships between the Abitibiwinnik and Cree.

Nitrogen budget in the Changjiang River drainage area

2012 ◽  
Vol 30 (4) ◽  
pp. 654-667 ◽  
Author(s):  
Tao Jiang ◽  
Zhiming Yu ◽  
Xiuxian Song ◽  
Xihua Cao
Keyword(s):  
Nitrogen Budget ◽  
Drainage Area ◽  
Changjiang River ◽  
River Drainage ◽  
The Changjiang River

scholarly journals Poriječje Sane - naseljenost, korištenje i zaštita voda

Geoadria ◽  
2017 ◽  
Vol 12 (1) ◽  
pp. 23
Author(s):  
Emir Temimović
Keyword(s):  
Water Management ◽  
Sustainable Development ◽  
Water Use ◽  
Bosnia And Herzegovina ◽  
Development Policy ◽  
Spatial Planning ◽  
Drainage Area ◽  
Northwestern Part ◽  
Sustainable Water Management ◽  
River Drainage

The paper discusses population, water use and protection in Sana River drainage area, situated in the northwestern part of Bosnia and Herzegovina. Geographic and hydrogeographic features have a strong influenceon the population of this area. Sustainable development policy presumes that sustainable water management is an integral part of spatial planning. That certainly encompasses water use and protection in the drainage area. Finally, the author expresses his opinion concerning the protected natural monuments and landscapes in the investigated area. 

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