Application of GIS in Watershed Management

Rudra, R. P.; Dickinson, W. T.; Sharma, Diya

doi:10.14796/jwmm.r175-21

Cited by 4 publications

(1 citation statement)

References 6 publications

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“…For example, the use of aerial imagery and GIS can be utilized to determine the priority level of groundwater criticality in a watershed according to its morphometry [3]. Furthermore, the integration of GIS and GAMES (the Guelph Model for Evaluating the Effects of Agricultural Management Systems on Erosion and Sedimentation) can be applied to assess the mechanism of sediment transport in watersheds [4].…”

Section: Introductionmentioning

confidence: 99%

Simulation Of Flood Mapping in Amasing Kali Village Using HEC-RAS 2D

2021

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This study aims to map the distribution of floods that occurred due to the overflow of the Amasing Kali River on Bacan Island, South Halmahera. The magnitude of the flood as an input in the Watershed (DAS) system was analyzed using the Nakayasu unit synthetic hydrograph (HSS) method, while the morphometric characteristics of the watershed were analyzed by extracting digital elevation model data (Digital Elevation Model, DEM) using a Geographic Information System (GIS) application. The simulation of flood distribution with return periods of 2, 5, 10 and 25 years was carried out by applying the HecRAS 2D application. The mapping of the analysis and simulation results of this study shows that the potential flood-affected areas are on the north and south sides of Amasing Kali village with inundation heights varying between 0.50 m – 1.50 m.

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Section: Introductionmentioning

confidence: 99%

Simulation Of Flood Mapping in Amasing Kali Village Using HEC-RAS 2D

2021

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An electrostatic radon detector designed for water radioactivity measurements

Wang

Andersen

Simpson

1999

Nuclear Instruments and Methods in Physics Research Section A:

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The emission and vertical flux of particulate matter <10 μm from a disturbed clay‐crusted surface

2001

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Arid and semi‐arid environments are important sources for the atmospheric loading of PM10 (particulate matter <10 μm), although the emission of this material is often limited by surface crusts. This study investigates the emission and vertical flux of PM10 from a clay‐crusted playa, with and without saltating grains to abrade the surface. Using a portable field wind tunnel, it was found that, despite disturbance to the surface, the emission of PM10 decays rapidly without abrasion. Only in the presence of saltating grains was PM10 continuously liberated from the surface, such that the emission rate (the total amount of PM10 emitted from the surface expressed as a horizontal flux) varied linearly with the saltation transport rate. Although the emission of PM10 was found to depend on saltation abrasion, past studies have tended to focus on the relationship between the vertical flux of PM10 (the amount of PM10 being transported vertically through the boundary layer) and the shear velocity. In this study, the vertical flux of PM10 was found to vary with the shear velocity to the power of 2·14. Although the vertical PM10 flux is a proportion of the emission rate (the horizontal flux), no statistically significant relationship was observed between the emission rate and the shear velocity. The disparity of these results is explained by the lack of a consistent relationship between the shear velocity and the saltation transport rate in this supply‐limited environment. This suggests that the observed relationship between the vertical PM10 flux and the shear velocity is a spurious correlation, resulting from the use of shear velocity to calculate the vertical dust flux. It is thus concluded that shear velocity is not an appropriate variable for emission modelling in supply‐limited environments and that improvements in dust emission modelling will only be realized if the abrasion process is the focus of a concerted research effort.

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Application of GIS in Watershed Management

Cited by 4 publications

References 6 publications

Simulation Of Flood Mapping in Amasing Kali Village Using HEC-RAS 2D

Simulation Of Flood Mapping in Amasing Kali Village Using HEC-RAS 2D

An electrostatic radon detector designed for water radioactivity measurements

The emission and vertical flux of particulate matter <10 μm from a disturbed clay‐crusted surface

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