Delineation of River Watershed and Stream Network Using Ilwis 3.7.1 Academic

2015 ◽  
Vol 1 (06) ◽  
pp. 10-15
Author(s):  
R. E. Daffi
Keyword(s):  
Stream Network ◽  
River Watershed

scholarly journals Applying GIS and SWAT to understand the stream network, hydrology, sediment and nutrient export from the Grand River watershed into Lake Erie

2021 ◽  
Author(s):  
Aslam Hanief
Keyword(s):  
Best Management Practices ◽  
Lake Erie ◽  
Headwater Streams ◽  
Agricultural Watershed ◽  
Phosphorus Loading ◽  
Nutrient Export ◽  
Stream Network ◽  
River Watershed ◽  
Grand River ◽  
The Impact

Headwater streams are important lotic systems that represent more than 80% of the total stream lengths in watersheds. The dynamic coupling of hydrological and biogeochemical processes in headwaters is responsible for regulating the chemical form, residence time and longitudinal transport of nutrients. Over time, stream modification (e.g. to enhance drainage in agricultural watershed) has altered natural stream flow-paths and thus, stream functionality. Such alteration has resulted in degradation of habitat and water quality, both in upland and downstream waters. Currently, nutrients exported from the Grand River (Ontario) watershed are contributing to eutrophication and Harmful Algal Blooms in Lake Erie. With respect to the Grand River watershed, this thesis examined (1) the impact of agriculture on the existing stream network, (2) the utility of the Soil and Water Assessment Tool to simulate hydrology, sediment and nutrient export that closely correlate with measured data, and (3) the application of Best Management Practices in the watershed with the intent of meeting provincial and transnational nutrient targets. The results showed that compared to the actual ground-truthed stream network, the predicted stream network based on topography underpredicted a total of 2,535 km of actual channel present in the watershed. Channels not anticipated by topography were mostly first-order, with low sinuosity, and were most common in areas with high agricultural land use, and are likely excavated extensions to headwater streams to facilitate drainage. Then, the sediment and nutrient loading at Dunnville, discharging to entering Lake Erie, was predicted to be 2.3[superscript⁻1] 105 t yr[superscript-1] of total suspended sediment, 7.9 [superscript⁻1] 103 t yr-1 of total nitrogen, and 2.5 ⁻1 102 t yr-1 of total phosphorus. Finally, implementing wide buffer strips, stabilizing channel banks and grassed waterways were found to be the most effective practices for reducing sediment and phosphorus loading into Lake Erie.

The huron river watershed council: grassroots organization for holistic watershed management

1999 ◽  
Vol 39 (12) ◽  
pp. 331-337 ◽  
Author(s):  
A. J. Brenner ◽  
L. A. Brush ◽  
J. S. Martin ◽  
K. Y. Olsson ◽  
P. L. Rentschler ◽  
...  
Keyword(s):  
Local Governments ◽  
River System ◽  
Water Runoff ◽  
Stream Network ◽  
Local Conditions ◽  
River Watershed ◽  
Wellhead Protection ◽  
Groundwater Supply ◽  
Political Boundaries ◽  
Huron River

The Huron River Watershed Council is a coalition of Huron Valley residents and local governments with the mission to inspire attitudes, behaviors, and economies that protect, rehabilitate, and sustain the Huron River. Its role as the coordinator and facilitator of river protection activities has been growing rapidly in recent years. The success of the Council has been its ability to respond to local conditions and deal with the concerns expressed by local communities. Its ability to cross jurisdictional and political boundaries that inhibit other organizations enables it to address water quality issues in an innovative and holistic manner. It does this through the series of programs listed below:The “Adopt-A-Stream” network of volunteers that regularly collect data on the biological integrity of the Huron River.A wellhead protection program to help communities prevent groundwater supply contamination caused by pollution leaching into local aquifers.The facilitation of a partnership to reduce phosphorus and soil entering the river system from storm water runoff in the urbanizing middle portion of the watershed.Land use planning and natural feature preservation tools to prevent the headwaters of the Huron River from developing in an environmentally destructive way.An information and education plan to reduce non-point source pollution by targeting specific behaviors of watershed residents.

scholarly journals Mapping and Analyzing Stream Network Changes in Watonwan River Watershed, Minnesota, USA

2017 ◽  
Vol 6 (11) ◽  
pp. 369
Author(s):  
Fei Yuan ◽  
Phillip Larson ◽  
Roman Mulvihill ◽  
Devon Libby ◽  
Jessica Nelson ◽  
...  
Keyword(s):  
Stream Network ◽  
River Watershed

scholarly journals Applying GIS and SWAT to understand the stream network, hydrology, sediment and nutrient export from the Grand River watershed into Lake Erie

2021 ◽  
Author(s):  
Aslam Hanief
Keyword(s):  
Best Management Practices ◽  
Lake Erie ◽  
Headwater Streams ◽  
Agricultural Watershed ◽  
Phosphorus Loading ◽  
Nutrient Export ◽  
Stream Network ◽  
River Watershed ◽  
Grand River ◽  
The Impact

Headwater streams are important lotic systems that represent more than 80% of the total stream lengths in watersheds. The dynamic coupling of hydrological and biogeochemical processes in headwaters is responsible for regulating the chemical form, residence time and longitudinal transport of nutrients. Over time, stream modification (e.g. to enhance drainage in agricultural watershed) has altered natural stream flow-paths and thus, stream functionality. Such alteration has resulted in degradation of habitat and water quality, both in upland and downstream waters. Currently, nutrients exported from the Grand River (Ontario) watershed are contributing to eutrophication and Harmful Algal Blooms in Lake Erie. With respect to the Grand River watershed, this thesis examined (1) the impact of agriculture on the existing stream network, (2) the utility of the Soil and Water Assessment Tool to simulate hydrology, sediment and nutrient export that closely correlate with measured data, and (3) the application of Best Management Practices in the watershed with the intent of meeting provincial and transnational nutrient targets. The results showed that compared to the actual ground-truthed stream network, the predicted stream network based on topography underpredicted a total of 2,535 km of actual channel present in the watershed. Channels not anticipated by topography were mostly first-order, with low sinuosity, and were most common in areas with high agricultural land use, and are likely excavated extensions to headwater streams to facilitate drainage. Then, the sediment and nutrient loading at Dunnville, discharging to entering Lake Erie, was predicted to be 2.3[superscript⁻1] 105 t yr[superscript-1] of total suspended sediment, 7.9 [superscript⁻1] 103 t yr-1 of total nitrogen, and 2.5 ⁻1 102 t yr-1 of total phosphorus. Finally, implementing wide buffer strips, stabilizing channel banks and grassed waterways were found to be the most effective practices for reducing sediment and phosphorus loading into Lake Erie.

scholarly journals Morphometric analysis and sub-watersheds prioritization of Nagmati River watershed, Kutch District, Gujarat using GIS based approach

2018 ◽  
Vol 39 (1) ◽  
pp. 131-139 ◽  
Author(s):  
Saif Said ◽  
Rabab Siddique ◽  
Mohammad Shakeel
Keyword(s):  
Morphometric Analysis ◽  
Water Conservation ◽  
Mature Stage ◽  
Drainage Pattern ◽  
Stream Network ◽  
Stream Length ◽  
River Watershed ◽  
Stage Of Development ◽  
Sensing Applications ◽  
Hypsometric Integral

AbstractMorphometric analysis of any watershed and its prioritization is one of the important aspects of planning for implementation of management programmes. Present study evaluates the quantitative morphometric characteristics of Nagmati River watershed in Kutch District of Gujarat by utilizing Cartosat-1 data (CartoDEM). In all 19 aerial and 6 linear morphometric parameters of the watershed have been evaluated. Drainage map of the study area reveals a dendritic drainage pattern with sixth order stream network comprising 492 numbers of streams and confining an area of 129.41 km2. Mean bifurcation ratio (Rb) and stream length ratio (RL) of the watershed evaluated are 3.44 and 0.54 respectively which corroborates the fact that drainage pattern is not influenced by the geological evolutions and disturbances in the recent past. The drainage density of 2.68 kmꞏkm−2 indicates impermeable subsoil material with sparse vegetation and moderate to low relief. Elongation ratio of 0.956 infers the basin to be closer to a circular shape. The geologic stage of development and erosion proneness of the watershed is quantified by hypsometric integral (HI) bearing value as 0.5, indicating the landscape to be uniform and in early mature stage. The study prioritizes eight sub-watersheds as high, medium and low for taking up soil and water conservation activities. Hence, remote sensing applications proved to be highly useful in extracting the precise data for the evaluation and analysis of watershed characteristics.

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