scholarly journals A method for determination of mountain forest drainage basin runoff in Japan

1978 ◽  
Vol 22 ◽  
pp. 181-190
Keyword(s):  
Drainage Basin ◽  
Mountain Forest ◽  
Forest Drainage

Determination of the drainage basin characteristics using vector GIS

2006 ◽  
Vol 37 (2) ◽  
pp. 129-142 ◽  
Author(s):  
H. Apaydin ◽  
F. Ozturk ◽  
H. Merdun ◽  
N.M. Aziz
Keyword(s):  
Form Factor ◽  
Drainage Basin ◽  
Drainage Density ◽  
Contour Length ◽  
Stream Length ◽  
Manual Method ◽  
Morphologic Characteristics ◽  
Basin Area ◽  
Relief Ratio

Detailed geomorphologic characteristics need to be compiled for performing hydrologic modeling of a basin. Basin form and hydrologic characteristics are to be related so the basin form must also be represented by quantitative descriptors. The typical morphologic characteristics used in hydrological analyses are basin area, perimeter, mainstream length, total stream length, contour length, basin shape (form factor, circularity ratio, compactness ratio, basin elongation), slope, drainage density, relief (maximum relief, relief ratio, relative relief), effective basin width, and median elevation. The objective of this study is to propose an algorithm to automatically calculate basin characteristics using vector GIS. The results produced by the algorithm were compared to the manual method and the two methods were found statistically similar.

scholarly journals ANALISIS MODEL KONSEPTUAL DEBIT AIR PADA DAS INDRAGIRI HILIR MENGGUNAKAN MODEL IHACRES

2020 ◽  
Vol 6 (2) ◽  
pp. 84
Author(s):  
Jusatria Jusatria
Keyword(s):  
Conceptual Analysis ◽  
Drainage Basin ◽  
Water Discharge ◽  
Rainfall Runoff ◽  
Residential Areas ◽  
Runoff Modeling ◽  
Nonlinear Loss ◽  
R Value ◽  
Rain Data

The modelling of Indragiri Hilir drainage basin is very necessary, considered by Indragiri Hilir area which sometimes overflows into residential areas and disturbs residents' activities. Conceptual analysis of water discharge through the Ihacres software could help to analyze the flow of Indragiri Hilir drainage basin. Rainfall-runoff modeling is used to predict runoff values, one of which is the IHACRES model. The IHACRES model produces nonlinear loss module parameters and linear hydrograph module units. AWLR that will be used is Kuantan Rengat station, Rain Data that will be used are from Tembilahan station and climatology from Air Molek station. Determination of the success of the model used equation R2 and R to calculate the deviation that occurs. The calibration, verification and simulation phase starts in 2010-2015. The result of conceptual analysis of water discharge of Indragiri Hilir drainage basin, In the calibration stage of the IHACRES Model, the best scheme is scheme 2 with R2 value 0.861 and R value 0.864. While the verification phase is carried out with the following year the best scheme is scheme 3 with the highest R2 value with R2 -2,550 and R-value 1,603 and the simulation scheme is the best scheme 5 with R2-1,904 and R-1,341.

Determination of Evolution Stages of Landform: A Comparative Study of Mountain-Plain (Kosi, Bihar) and Plateau-Plain (Kangsabati, WB) Regions of Tropical India

2019 ◽  
Vol 2 (1) ◽  
pp. 30-40
Author(s):  
Avijit Mahala ◽  
Varuni Pathak
Keyword(s):  
Drainage Basin ◽  
Remote Sensing And Gis ◽  
Morphometric Parameters ◽  
Plateau Region ◽  
Important Indicator ◽  
Plain Area ◽  
Shuttle Radar Topographic Mission ◽  
Quantitative Geomorphology ◽  
Arc Gis

The major aim of quantitative geomorphology is to understand the geomorphological stages of evolution of any area. The quantitative revolution and the development of remote sensing and GIS techniques have brought greater attention to this field of analysis. We have used a morphometric analysis, which is an important indicator to understand the geomorphic stages of evolution of any drainage basin, to compare the drainage basin characteristics and related stages of evolution of a mountain-plain and plateau-plain drainage basin in tropical India. The Kosi basin has been selected for the mountain-plain area and Kangsabati basin is the chosen region for the plateau-plain area. Different drainage morphometric parameters and measurements related to linear, areal, relief characteristics have been determined through the use of SRTM (Shuttle Radar Topographic Mission) GeoDEM and ARC GIS 10.1. Area-altitude relationship and hypsometric characteristics have also been accessed to identify the stages of geomorphic evolution. All the relief characteristics indicate Kosi in a young or rejuvenated stage when compared to the mature plateau region of the river of Kangsabati. Morphometric characteristics also indicate that there are high geologic and geomorphological controls on river basin characteristics.

Use of Small, Temporary, Floodplain Tributaries by Juvenile Salmonids in a West Coast Rain-Forest Drainage Basin, Carnation Creek, British Columbia

1987 ◽  
Vol 44 (2) ◽  
pp. 262-270 ◽  
Author(s):  
G. F. Hartman ◽  
T. G. Brown
Keyword(s):  
Rain Forest ◽  
Drainage Basin ◽  
Coho Salmon ◽  
Oncorhynchus Kisutch ◽  
Age Classes ◽  
Catchment Basin ◽  
Seasonal Movement ◽  
Sand And Gravel ◽  
Salmo Clarki ◽  
Forest Drainage

Seasonal movement of trout (Salmo clarki and S. gairdneri) into and out of three tributaries which drain areas ranging from 15 to 100 ha within the lower Carnation Creek catchment basin were monitored periodically from 1972 to 1985. The number of trout entering the three tributaries relative to total trout was as high as the number of coho salmon (Oncorhynchus kisutch) entering these tributaries relative to total coho. The percentage of the salmonid population represented by trout was highest in the two largest tributaries and lowest in the smallest. Trout were most clearly associated with nonvegetated sand and gravel bottom portions of the three tributaries. Coho were associated with this habitat too, but they also frequented portions of the tributaries that were vegetated and had a mud substrate. In the two largest tributaries, trout were represented by more age classes than were coho salmon. The paper considers some of the implications of use of small drainages by trout to habitat managers.

The Design and Implementation of Drainage-Basin Extraction

2012 ◽  
Vol 610-613 ◽  
pp. 2440-2444
Author(s):  
Dan Dan Su ◽  
Guang Da Gao ◽  
Ji Zhang Fan ◽  
Guang Sheng Liu ◽  
Chuan Tao Guan
Keyword(s):  
Current Flow ◽  
Drainage Basin ◽  
Flow Direction ◽  
Open Data ◽  
Grid Data ◽  
River Classification ◽  
Terrain Elevation ◽  
Processing Steps

The flow model was improved on, and the two kinds of circumstances were discussed. When the current flow point is on the borders, the flow direction is remained if the water doesn’t flow along the borders. When the current flow point is not next to the blank spots in two adjacent directions, the flow direction is remained. And then, I designed the algorithm of the follow-up processing steps to extract drainage-basin, such as process depression, the determination of river, river classification, partition side-area, search drainage- basin border, smooth river and smooth drainage-basin border. Finally, I solved the problems about the around-flows and the cross-flows. The input data contains the terrain elevation of the grid data, and the output data is MAPGIS open data.

scholarly journals Water quality monitoring of the Pirapó River watershed, Paraná, Brazil

2015 ◽  
Vol 75 (4 suppl 2) ◽  
pp. 148-157 ◽  
Author(s):  
E. C. Bortoletto ◽  
H. A. Silva ◽  
C. M. Bonifácio ◽  
C. R. G. Tavares
Keyword(s):  
Water Quality ◽  
Drainage Basin ◽  
Sampling Site ◽  
Principal Component ◽  
Water Quality Monitoring ◽  
River Watershed ◽  
Sampling Points ◽  
Microbiological Parameters ◽  
Thermotolerant Coliforms

This study aimed to evaluate the water quality of the Pirapó River watershed in Paraná, Brazil, and identify the critical pollution sites throughout the drainage basin. The water quality was monitored during the period from January 2011 to December 2012. Nine points distributed throughout the main channel of the Pirapó River were sampled for a total of 17 samplings. The water quality was evaluated based on the determination of 14 physical, chemical and microbiological parameters. Analysis of the variables monitored in the Pirapó River watershed using factor analysis/principal components analysis (FA/PCA) indicated the formation of three distinct groups of parameters: water temperature (Twater), dissolved oxygen (DO) and a group composed of total suspended solids (TSS), turbidity and nitrite (NO2–). The parameters Twater and DO exhibited a relationship with the seasonality, and the TSS, turbidity, and NO2– levels were correlated with surface runoff caused by rainfall events. Principal component analysis (PCA) of the sampling points enabled the selection of the 10 most important variables from among the 14 evaluated parameters. The results showed that the nitrate (NO3–), NO2–, TSS, turbidity and total phosphorous (TP) levels were related to the soil type, and the parameters DO, electrical conductivity (EC), ammoniacal nitrogen (N-NH3) and thermotolerant coliforms (TC) were related to organic matter pollution, with the P5 sampling site being the most critical site. The ordination diagram of the sampling points as a function of the PCA indicated a reduction from 9 to 5 sampling points, indicating the potential for decreasing the costs associated with monitoring.

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