Essay about GIS Analysis in Flood Assessment and Modeling

Next, it is necessary to identify the land that is possibly flooded and this can be calculated as:

The idea that one giant flood is responsible for all the erosional formations on the Earth is a grand assertion which ignores the vast complexity and rich diversity of the Earth’s landscape. The power of water based erosion is responsible for carving landscapes, and the deposition of sediment across wide distances, a process which cannot occur rapidly.

The watershed model is used to develop projections of peak stream flows and water surface (flood)

After watching the devastating news on TV, I wanted to learn more about the ways we can control future flooding and understand why more powerful storms are becoming more frequent. I found the most interesting fact in the article to be that climate change is going to continue producing more violent storms. As the article states, society needs to prepare for more extreme rainfall and know that everyone is at risk. I would like to know some of the exact areas that need better flood prevention systems. After reading this article, I read another article in the New York Times entitled “As Climate Changes, Southern States Will Suffer More Than Others” (Plumer and Popovich, 2017). It explained in greater detail, that warmer areas like Texas will see a greater flooding impact from warming patterns. If I was in charge of the research, I would have included some of the New York Times data to provide greater detail on areas that are at greatest risk for epic

It is suggested that either a sequential test be applied to the site prior to any build work to steer the development to the areas that are at the lowest risk of flooding, alternatively by carrying out a site-specific flood risk assessment it would be demonstrated that the proposed residential development coulc

The methodology used was to utilize the Recurrence Interval formula (R) = (N+1)/M, to determine the recurrence interval and magnitude of historical floods provided on the Stream Gauge Data of Peak Flood Discharges on Clearwater River in Hazard City. Also, I reviewed the flood insurance map to

A floodplain is flat (or nearly flat) land which is usually adjacent to a steam or river that experience periodic flooding. It includes the floodway, which consists of the stream channel. It can form by a river overflowing its banks during heavy rains. The river will deposit materials onto the flood plains when the water loses speed and receded back into the river. The heavier and coarser sediments are first deposited along the river’s edge followed by the smaller and lighter materials that are deposited at the outer edge. This natural process will form barriers which help prevent floods

Professor Pisces' recently published research paper 'The hydrology of flood plains: a Victorian example' detailed six months of computer modelling that had resulted in a conclusion that the concreting of the lower reaches of the Newstown River would not entirely remove the risk of flooding upstream.This concreting project, funded by the state government.

The primary goal of flood hazard mapping is to act as an information system to raise our understanding and awareness of coastal risk. Flood hazard mapping is essential for accurately designing and planning for flood-prone areas. It provides easily understood and easy to read maps which includes of identification of areas prone to flood. Most of the time, these flood hazard maps are associated with rapidly- accessible charts. With all of these, it can greatly help lessen casualties and pose for good response efforts when flooding occurs. Flood hazard maps are designed to increase awareness of the likelihood of flooding among public, local authorities and other organisations. People who live in areas that are prone to flood are also encouraged

And now, on this mild, cloudless day in New York City, it’s strange to think that a week ago we were laying sandbags at the floodgates along the East River. Last Friday, as a co-worker and I studied the emergency flood map—I live in north Brooklyn, a block from the border of Zone C, and he lives at the southern tip of Manhattan, Zone A, and subsequently left town that night—I couldn’t help but think that what we were really looking at was a map of places that, after a few decades of rising sea levels, may no longer exist.

As one of the watersheds in TRCA jurisdiction, the Don River watershed is over 80% developed and has a very high rainfall runoff response. There are three high risk flood vulnerable areas in this watershed; the Hoggs Hollow, Lower Don, and the Yonge and Elgin Mills area. A hydrological model has been established for Don River watershed and has been updated in 2004. After that, 12 years of meteorological and stream flow data has been collected and a number of significant storm events have occurred. Another hydrology update is deemed necessary to utilize the new datasets and to confirm the design requirement for a number of key projects.

With the increase in computer processing power, this LiDAR data should be should be consider in developing the overland flow path understanding in City Basement Flooding Program. Access to this additional data source will increase the accuracy of model development and validation.

GIS models have been used to combine, integrate, and interpret geological, geochemical, geophysical, and other data. These studies can be grouped based on their main goal of identify prospective geothermal areas at a regional scale, or defining specific sites for drilling a well at the local scale (Noorollahi et al., 2008).

Rainfall is an important climatological parameter,and knowledge of its temporal and spatial patterns is useful for researchers working in many disciplines, In this study , spatial interpolation techniques were implemented in a Geographic Information System (GIS) to study the spatial variability of monthly rainfall in Iraq. Ten years (2003-2013) of climate data ( average monthly rainfall )from 24 weather stations distributed throughout Iraq were used in the analyses. Literature suggests that there is no single preferred method of

Rainfall induced landslide hazards in Kenya represents a major challenge and remain an important issue in disaster management especially in Kenya’s central province region where the effects are very common with the onset of El nin ̃o rains. The main aim of this study is to develop a rainfall induced landslide probability map for Kenya’s central province. In order to achieve this, process based methods were used to map landslide areas using the following factors: slope, rainfall, land cover change,Normalized DifferenceVegetation Index (NDVI)change, Curvature, watershed, and soil characteristic including: type, texture, soil bulk density, Base Saturation, and Total Water Available Distribution Map. The minimum conditions were set for each factor for landslide occurrence. Slope stability mapping was done to determine the stable areas and thus derive the probability of landslide occurrence. Statistical methods were then employed by means of weights of evidence to achieve the probability weights for each factor considered to cause landslides. The factors were then overlaid using the probability