Results 21 to 30 of about 6,946,829 (323)

Influência da acurácia de completude na delimitação de áreas de preservação permanente

open access: yesConfins, 2018
Since 1934 with the "Protective Forests" until 2012 with the "Permanent Preservation Areas", the Brazilian Forest Code foresees the creation of areas destined to the preservation of natural resources.
Mayara Soares de Sousa   +1 more
doaj   +1 more source

Flow and Jamming of Granular Suspensions in Foams [PDF]

open access: yes, 2014
The drainage of particulate foams is studied under conditions where the particles are not trapped individually by constrictions of the interstitial pore space.
Haffner, B., Khidas, Y., Pitois, O.
core   +5 more sources

Bifurcation dynamics of natural drainage networks [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2013
As water erodes a landscape, streams form and channellize the surficial flow. In time, streams become highly ramified networks that can extend over a continent. Here, we combine physical reasoning, mathematical analysis and field observations to understand a basic feature of network growth: the bifurcation of a growing stream.
Petroff, A. P.   +3 more
openaire   +4 more sources

Prevention of flash floods in the town of Kokrajhar through efficient drainage network design [PDF]

open access: yesThe Holistic Approach to Environment
Flash floods are common in the town of Kokrajhar in north-eastern Indian state of Assam. Many areas in the town of Kokrajhar are submerged in water almost every year due to floods during rainy season.
Sagar Basumatary   +2 more
doaj   +1 more source

Stages of river network formation of the Upper Kama River basin in the Pleistocene

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2020
River network formation in the northeast part of the East European Plain was discussed. The relevance of the study is due to a lack of knowledge about the functioning and development of the Upper Kama River basin in the Pleistocene. Most of the available
N.N. Nazarov, S.V. Kopytov
doaj   +1 more source

Critical point network for drainage between rough surfaces [PDF]

open access: yes, 2007
In this paper, we present a network method for computing two-phase flows between two rough surfaces with significant contact areas. Low-capillary number drainage is investigated here since one-phase flows have been previously investigated in other ...
A. Polycarpou   +43 more
core   +5 more sources

Simulating temporal evolution of pressure in two-phase flow in porous media [PDF]

open access: yes, 1998
We have simulated the temporal evolution of pressure due to capillary and viscous forces in two-phase drainage in porous media. We analyze our result in light of macroscopic flow equations for two-phase flow. We also investigate the effect of the trapped
Alex Hansen   +30 more
core   +2 more sources

Hydrogical Analysis of Flash Flood using GIS in AL-Saff Area, Helwan, Egypt [PDF]

open access: yesPort Said Engineering Research Journal, 2016
Through the current research, a systematic methodology, for estimating flood hazard and risk maps, based on a geographic approach using Geographical Information System (GIS) and Remote Sensing (RS), has been developed.
Ahmed Amin   +4 more
doaj   +1 more source

Surface network and drainage network: towards a common data structure

open access: yesJournal of Spatial Information Science, 2023
The surface network is an application of the Morse-Smale complex to digital terrain models connecting ridges and thalwegs of the terrain in a planar, undirected graph.
Eric Guilbert   +3 more
doaj   +1 more source

Liquid filled canyons on Titan [PDF]

open access: yes, 2016
In May 2013 the Cassini RADAR altimeter observed channels in Vid Flumina, a drainage network connected to Titan’s second largest hydrocarbon sea, Ligeia Mare. Analysis of these altimeter echoes shows that the channels are located in deep (up to ~570 m),
Birch, S. P. D.   +7 more
core   +1 more source

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