Flood risk analysis is more complex in urban areas than that in rural areas because of their closely packed buildings, different kinds of land uses, and large number of flood control works and drainage systems. The purpose of this paper is to propose a practical framework for flood risk analysis and benefit assessment of flood control measures in urban areas. Based on the concept of disaster ri...

The flood-mediated connectivity between river channels and floodplains plays a fundamental role in flood hazard mapping and exerts profound ecological effects. The classic nearest neighbor search (NNS) fails to derive this connectivity because of spatial heterogeneity and continuity. We develop two novel data-driven connectivity-deriving approaches, namely, progressive nearest neighbor search (...

A method of wetland mapping and flood survey based on satellite optical imagery from the Moderate Resolution Imaging Spectroradiometer (MODIS) Terra instrument was used over the Inner Niger Delta (IND) from 2000–2013. It has allowed us to describe the phenomenon of inundations in the delta and to decompose the flooded areas in the IND into open water and mixture of water and dry land, and that ...

Abstra t. Bounded rea hability or model he king is widely believed to work poorly when using de ision diagrams instead of SAT pro edures. Re ent resear h suggests this to be untrue with regards to syn hronous systems, parti ularly digital ir uits. This paper shows that the belief is also a myth for asyn hronous systems, su h as models spe i ed by Petri nets. We propose Bounded Saturation, a new...

The purpose of this study was to improve the performance of a small gamma camera, utilizing a NaI(Tl) plate and a 5" position sensitive PMT. We attempted to build a NaI(Tl) plate crystal system which retained all its advantages, while at the same time integrating some of the advantages inherent in an array-type scintillation crystal system. Flood images were obtained with a lead hole mask, and ...

First posted June 1, 2023 For additional information, contact: Director, Nebraska Water Science CenterU.S. Geological Survey5231 South 19th StreetLincoln, NE 68512Contact Pubs Warehouse Digital flood-inundation maps for an 8-mile reach of Papillion Creek near Offutt Air Force Base, Nebraska, were created by the U.S. Survey (USGS) in cooperation with Force, Base. The maps, which can be accessed ...