The Himalayan regions are vulnerable to all kinds of natural hazards. On 7 February 2021, a deadly disaster occurred near the Tapovan, in Uttarakhand, Himalayas. During event, large volume debris along with broken glacial fragments flooded Rishi Ganga River and washed away nearby hydropower plants (Rishi Tapovan), which was revealed from detailed analysis multi spectral bi-temporal satellite da...

The widespread evidence for liquid water on the surface of early Mars is di cult to reconcile with a dimmer early Sun. Many geomorphological features suggestive of aqueous activity, such as valley networks and open-basin lakes, date to approximately 3.7 billion years ago1–5, coincident with a period of high volcanic activity5,6. This suggests that volcanic emissions of greenhouse gases could ha...

STATEMENT OF PROBLEM Digital Elevation Models (DEMs) are the digital representation of topographic and/or manmade features located on the surface of the earth. DEMs are widely used for hydrologic analyses, resource management, transportation planning, earth sciences, and environmental assessment. Increased use of DEMs in these wide-ranging applications has led to greater need for higher resolut...

This paper first exposes an algorithm that leads to fuzzy segmentation of color images. This algorithm performs, as in the watershed method, a progressive flood of the gradient image from pixels of lowest gradients. Membership degrees of pixels to regions depend on topographic distance, which takes into account both the distance to the core and the gradient norms. Geometric and colorimetric fea...

Topographic data are increasingly available at high resolutions (<10 m) over large spatial extents to support detailed flood inundation modeling and loss estimation analyses required for flood risk management. This paper describes ParBreZo, the parallel implementation of a two-dimensional, Godunovtype, shallow-water code, to address the computational demand of high-resolution flood modeling at ...

.......................................................................................................................................... 3 WHAT IS LIDAR? ................................................................................................................................. 3 HYDROGRAPHIC LIDAR vs TOPOGRAPHIC LIDAR................................................................ 4 LID...

I studied amphibians and their associated wetlands in the Missouri River floodplain in Iowa from 2010-2013. I had the opportunity to study the effect of a catastrophic flood on an anuran community in the Missouri River floodplain. Three species (plains leopard frog, Woodhouse’s toad, and Blanchard’s cricket frog) had only minor changes in adult male occupancy rate in the two years after the flo...