Wendi Goldsmith is the CEO of the Bioengineering Group and has recently published a book, Bioengineering Case Studies with some her colleagues through Springer. This book includes a number of case studies and highlights several stream bank slope stabilization techniques whereby best practice techniques were used.
The release of this book is timely as this past fall, the Army Corps of Engineers Hydrologic Engineering Center announced in its Fall 2013 newsletter that the bank stability analysis model, BSTEM, will be incorporated into HEC-RAS. One aspect of BSTEM that sounds intriguing is that it can compare factor of safety values for existing conditions and banks that have been subjected to stabilization methods. Until now, HEC-RAS has only been able to assess scour/incision vertically. With the incorporation of BSTEM, it seems as though lateral erosion can be modeled as well.
Another worthwhile read recently released is the MA Department of Fish & Game Division of Ecological Restoration’s 2013 Annual Report which is focused on the value of restoration and is available as a pdf here.
Posted in monitoring, river restoration | Leave a Comment »
Pre and post project photographic monitoring has been around for a while. I’ve seen some drab appendix tables that list the lat/long and the azimuth for where each photograph was taken. I’ve also seen photographs jammed into an appendix as well. Why not take a more modern approach using the features ArcGIS.com and photo hosting services such as Flickr or PicassaWeb? Assuming you have your lat/long, azimuth and photo filename in Excel, a pretty powerful online map can be made that shows where each photo was taken, the direction of the photo and the photo itself in a map that can be panned and zoomed and presumably have a recent aerial photo basemap.
Here are three ESRI blog posts that can help make such a map:
How to configure pop-ups:
Adding photos from Flickr, PicassaWeb or WindowsLive
Rotating arrows to show azimuth:
If you have an ArcGIS.com organization prescription, then you can take the map you’ve made with all your georeferenced photos, configured pop-ups and arrows showing the photo azimuth and then put that dynamic map into a PowerPoint presentation. Pretty cool!
Posted in Excel tools, GIS, monitoring | Leave a Comment »
The USGS has reviewed several gauges throughout the state and has now developed regional bankfull geometry curves. For those of us waiting for these data so that we can put them to use on projects, this is a great development. The study does have a few geographic limitations, so take note of those caveats before putting the equations to use.
Posted in geomorphology, USGS gage data, watershed analysis | Leave a Comment »
Every year, ESRI hosts its annual users group meeting in San Diego. For several years now, the day before the big conference opens, the hydro/water resources folks at ESRI host a 1 day seminar. All the videos from that one day event can be viewed here:
Updates to ArcHydro, GeoRAS and GeoHMS are provided.
Thank you ESRI!
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Earlier this year, the USGS has released a web mapping service called Streamer.
It’s a fairly straightforward tool. A user can either trace a channel upstream or downstream. From there, users can get a summary or detailed report that has some basic information such as how many states the river is in, or how many USGS gages are on the trace.
A bit more background on the tool is available here: http://nhd.usgs.gov/newsletters/News_July_13.pdf
Posted in GIS, software | Tagged gis, USGS | Leave a Comment »
AIR Worldwide has just released a special edition of it’s newsletter that highlights some of the challenges to the private flood insurance market in the US. Here they are:
“The first challenge is the market itself. Because of the U.S. Government’s heavy involvement, the private flood insurance market has not been attractive to insurance innovators and pioneers. The market still has to fully embrace flood as a peril that can be insured in a profitable way—an opportunity that AIR’s new flood model can help realize.
A second challenge is the very size of the U.S. AIR has overcome this challenge with a state-of-the-art precipitation model that couples a global circulation model with a regional numerical weather prediction model to produce realistic precipitation patterns.”
As I wrote previously, the National Academies Press released its book Mapping the Zone, a key recommendation was the acquiring high resolution elevation data (e.g. LIDAR). AIR Worldwide is adding to the conversation by taking a forward looking approach and doing it’s best to predict likely precipitation regimes.
The dynamic here is rather interesting. FEMA has changed its flood insurance premium policy in 2012 due to the Biggert-Waters act. In some case, flood insurance premiums are skyrocketing, such as in some coastal areas that were hit by Hurricane Sandy. Properties located within floodplains are also affected by this policy. Obviously, no one has a crystal ball, but I am interested in hearing what people think some trends could be with respect to existing home and new homes being built within floodplains. Historically, I would completely agree that FEMA has been heavily involved in the private insurance market. With Biggert-Waters now in affect, subsidies being eliminated and premiums going up, it’s not clear to me how large FEMA’s involvement with distorting price will be with respect to influencing flood insurance premiums. Not only will Biggert-Waters have a large effect on the private insurance market, but it seems as though there will have to be some real on the ground changes in land use. I suspect many homeowners and businesses located within a floodplain will now be motivated to take a harder look at various flood proofing measures. FEMA’s list of retrofitting measures includes raising a property’s elevation, wet and dry floodproofing, relocation, constructing levees and floodwalls and demolition. Now that premiums are increasing substantially, I’m curious to know if demolition or abandonment might become more prevalent.
The property casualty insurance market isn’t an area I’ve covered too much on this blog, but given the damage that floods induce on people and fluvial and riparian ecosystems, it seems like a topic worth some review. Currently, the Property Casualty Insurance Association of America is having their annual meeting in Boston. For Twitter followers, the #PCIAM20123 hashtag might be of some interest.
Posted in flooding, recovery | Tagged FEMA, flood insurance | Leave a Comment »
This looks like a great resource for water resource managers, urban planners and hydrologists:
Thank you to the authors Dr. Bedient, Dr. Huber, and Dr. Vieux
Posted in flooding, hydrology | Leave a Comment »