Stream frequency over interval queries

2018 ◽  
Vol 12 (4) ◽  
pp. 433-445 ◽  
Author(s):  
Ran Ben Basat ◽  
Roy Friedman ◽  
Rana Shahout
Keyword(s):  
Stream Frequency

scholarly journals Morphometric and hydrographie characteristics of torrents of NW Péloponnèse, Greece

2007 ◽  
Vol 40 (4) ◽  
pp. 1578
Author(s):  
M. Pagonas ◽  
N. Kontopoulos
Keyword(s):  
Quantitative Analysis ◽  
Drainage Density ◽  
Main Direction ◽  
Infiltration Capacity ◽  
Drainage Systems ◽  
Total Length ◽  
Fault Systems ◽  
Stream Frequency ◽  
Tectonic Features ◽  
High Infiltration

The study area includes the catchments of Selemnos, Xylokeras and Volinaios torrents, with 456 streams of 277.848 km total length. The pattern is generally dendritic. A quantitative analysis of the drainage systems of the study area was interpreted and then correlated to the fault systems that appear in the area. The main direction of the streams and the tectonic features is WSW-ENE. The drainage density and stream frequency is highly variable as a result of many factors, most important of which is lithology with high infiltration capacity. The number and the length of most streams show divergence of the 1st and 2nd law of Horton since they have dissimilar values from those theoretically expected.

scholarly journals Morphometric analysis of river subwatersheds using geographic information system and principal component analysis, northeast of Algeria

2017 ◽  
Vol 19 (1) ◽  
pp. 155-172 ◽  
Author(s):  
KHANCHOUL Kamel ◽  
SAAIDIA Bachir
Keyword(s):  
Principal Component Analysis ◽  
Land Degradation ◽  
Principal Component ◽  
Component Analysis ◽  
Drainage Density ◽  
Morphometric Parameters ◽  
Geomorphic Parameters ◽  
Stream Frequency ◽  
Basin Area ◽  
Relief Ratio

In the present paper an attempt is made to study the morphometric characteristics of five watersheds which are part of Seybouse and Coastal basin of Constantine located in northeast of Algeria. The study focuses on evaluating the effect of morphometric parameters on land degradation. The Geographical Information Systems which represent efficient tools in determination of drainage basin morphometric properties and principal component analysis are applied to ten geomorphic parameters on twenty subwatersheds, to group the parameters under different components based on significant correlations. Some morphometric parameters are computed and analyzed such as basin area, drainage density, stream frequency, form factor, orographic coefficient, hypsometric integral, and lithology index, basin slope, average overland flow distance, basin relief ratio. Outcomes of the matrix of correlation and principal component analysis of ten geomorphic parameters clearly depict that fifty percent of the variables are strongly correlated with the components like basin area, drainage density, stream frequency, orographic coefficient and relief ratio. It has been found that Guis sub-basin, three sub-basins of the Saf Saf watershed and all the sub-basins of the Mellah watershed are subjected to high land degradation, thus, creating an urgent need for applying soil and water conservation measures.

scholarly journals Drainage basin morphometric analysis and its relationship with altitude of Uttarkashi District

2012 ◽  
Vol 4 (2) ◽  
pp. 167-171
Author(s):  
N. P. Naithani ◽  
Mala Bhatt
Keyword(s):  
Morphometric Analysis ◽  
Drainage Basin ◽  
Drainage Density ◽  
Drainage Basins ◽  
Third Order ◽  
Garhwal Himalayas ◽  
Stream Frequency ◽  
Bhagirathi River ◽  
Thrust Zone ◽  
Chlorite Schist

The area of investigation lies between Maneri and Gangnani along the Bhagirathi river in the lesser and central Himalayan block of Garhwal Himalayas. The rocks of Garhwal group are represented by quartzites, sericite quartzite’s and talc chlorite schist intruded by metabasics, whereas the Central crystallines are constituted by gneisses, schists, migmatites and amphibolites. For the purpose of drainage basin morphometric analysis 100 third order drainage basins were marked. Drainage basin morphometric parameters of 100 basins were calculated. On the basis of lithology and tectonic setup,the area was divided into three morphogenetic units viz Central crystallines, Thrust zone and Garhwal group. The basins which were situated below 2500 mts are categorized under low altitudes and above 2500 as basins of higher altitudes.The relationship between deainage basinmorphometric parameters and altitude suggest that basins situated at higher altitude have higher value of stream frequency, number of first and second order streams,fine texture and low drainage density.

Emergence density and stream frequency spectra of Tadarida brasiliensis

2016 ◽  
Vol 140 (4) ◽  
pp. 3300-3300
Author(s):  
Stephanie Dreessen ◽  
Cassi Mardis ◽  
Laura Kloepper
Keyword(s):  
Tadarida Brasiliensis ◽  
Frequency Spectra ◽  
Stream Frequency

Prediction of stream frequency from maps

1970 ◽  
Vol 7 (3-4) ◽  
pp. 101-115 ◽  
Author(s):  
Paul V. Sellmann ◽  
S. Lawrence Dingman
Keyword(s):  
Stream Frequency

scholarly journals Morphometric Analysis of River Donga Watershed in Taraba State Using Remeote Sensing and Gis Techniques

2019 ◽  
pp. 1-13
Author(s):  
Adelalu, Temitope Gabriel ◽  
Yusuf, Mohammed Bakoji ◽  
Ibrahim Abdullahi ◽  
Idakwo Victor Iko-Ojo
Keyword(s):  
Drainage Basin ◽  
Analytical Description ◽  
Drainage Density ◽  
Morphometric Parameters ◽  
Scientific Database ◽  
Gis Techniques ◽  
Stream Frequency ◽  
Medium Permeability ◽  
Hydrological Investigation ◽  
Development And Management

As climate change infiltrate and influence every sphere of the globe, the continuous study of the drainage features and assessment of the drainage basin as a fundamental geomorphic unit in water resources development and management cannot be relegated. This work has considered the analytical description of the physical division of RDCA. The three domains of the morphometric parameters (linear, areal, and relief aspects of the basin) were considered for the analysis.  Remote sensing and GIS techniques were adopted in the analysis of the data using hydrological and surface tool in ArcGIS 10.2. The acquired SRTM DEM was used to delineate the catchment area and major morphometric parameters were estimated. The results show that the basin is elongated with low leminiscate ratio. RDCA is a 7th order drainage basin, with an area of 11,355 km2, having a length of about 164 km2. Value of drainage density indicates moderate runoff potentials. Stream frequency, bifurcation ratio and constant channel maintenance indicate medium permeability and that the basin produces a flatter peak of direct runoff for a longer duration. Channel encroachment, land use and land cover change seems the cause of perennial flooding in the region than change in drainage features. This study provides scientific database for further comprehensive hydrological investigation of RDCA around which Kashimbilla dam is located.

scholarly journals Terrain Attributes and Drainage Texture as Indicators of Landslide Occurrence in a Part of Garhwal Himalaya, India

1995 ◽  
Vol 11 ◽  
Author(s):  
A. K. Awasthi ◽  
S. H. Tabatabaei ◽  
Bhawani Singh ◽  
G. S. Mehrotra
Keyword(s):  
Structural Features ◽  
Drainage Density ◽  
Morphometric Parameters ◽  
Morphometric Parameter ◽  
Areal Extent ◽  
Landslide Area ◽  
Third Order ◽  
Terrain Attributes ◽  
Stream Frequency ◽  
Drainage Texture

Slope movement processes along with other terrain attributes influence surface morphology of an area. Correlation analysis of nineteen morphometric parameters and the landslide areal extent in 26 third order basins in a part of Garhwal region of the Lesser Himalaya, U.P. India, indicates that fraction of landslide area (Ls) in a basin has statistically significant correlation coefficient of about 0.86, 0.84, 0.68 and -0.55 (at 99% confidence level) with drainage texture (DT), stream frequency (SF), drainage density (DD) and basin circularity (BC) respectively. Drainage texture which is the product of stream frequency and drainage density, is one single morphometric parameter in a basin that has in it, the influence of many morphometric parameters which in turn, are reflection of the cumulative effect of elevation, slope, lithology, structural features, vegetation and hydrological condition. Higher the drainage texture, higher is the landslide areal extent. Based on regression analysis, a relationship between fraction of landslide area (Ls) and drainage texture (DT) of third order basin has been worked out which suggests that the third order basins always have some unstable slope faces. With a drainage texture of about 185, almost all the slopes are expected to be unstable. Relatively stable areas are associated with lower values of drainage texture. Circular basins with low relief have lower values of DT and therefore, their slopes are relatively more stable. This identified relationship is found to be useful within the error limit of 25 percent and is, therefore, recommended for use as a first step towards the landslide hazard zonation in similar terrains.

scholarly journals Morphometric Analyses of Osun Drainage Basin, Southwestern Nigeria

2016 ◽  
Vol 8 (4) ◽  
pp. 9 ◽  
Author(s):  
Akinwumiju A. S. ◽  
Olorunfemi M. O.
Keyword(s):  
Overland Flow ◽  
Drainage Basin ◽  
Drainage Density ◽  
Main Stream ◽  
Stream Length ◽  
Southwestern Nigeria ◽  
Stream Frequency ◽  
Morphometric Analyses ◽  
Drainage Channels ◽  
Drainage Texture

This study evaluated some morphometric parameters with a view to assessing the infiltration potential of Osun Drainage Basin (ODB), Southwestern Nigeria. Input data were derived from SPOT DEM using ArcGIS 10.3 platform. ODB has an area extent of 2,208.18 km2, and is drained by 1,560 streams with total length of 2,487.7 km. The Relief Ratio (5.6) suggests that ODB is characterized by topographic high and topographic low. Thus, infiltration potential would be low as surface runoff would have less time to infiltrate before entering the drainage channels. The computed values of Drainage Texture (0.52), Stream Number (1,560), Total Stream Length (2,487.7 m) and Main Stream Length (119 m) indicate that larger percentage of annual rainwater would leave ODB as river discharge. Stream Frequency, Basin Perimeter, Length of Overland Flow and Drainage Density influence Infiltration Number across the basin. Infiltration Number increases with increasing Stream Frequency (r = 0.95) and Drainage Density (r = 0.78); and Length of Overland Flow increases with decreasing Drainage Density (r = -0.83), Stream Frequency (r = -0.51) and Infiltration Number (r = -0.45). The study concluded that basin’s infiltration potential is moderate as suggested by the mean Infiltration Number.

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