Monday, June 20, 2011

Need Genealogy Pointers? Just Ask Us!

The Terrebonne Parish Library has one of south Louisiana's most extensive collections of genealogy materials. We also have another resource to help you get started researching your genealogy: our knowledgeable staff! There's no substitute for experience, and we have people here with a lot of it. We are always ready to aid you in your search of the library’s extensive genealogical records as you assemble your family tree.

You're most likely to find what you want for if you can explain precisely what it is you’re looking for. When you come to the library ready to research, bring with you as many details as you have managed to identify so far, such as when and where your ancestor lived, his or her full name (including any known nicknames), as well as the names of his or her family members.

Unfortunately, our staff can't perform extended research into your family history for you, but we are always happy to advise you on the use of the materials in our collection and help you to brainstorm additional avenues of inquiry. If you are new to genealogy, and need help getting started, the best thing to do is call to set up an appointment for us to show you the basics. Our number is 876-1733, extension 2.

The Genealogy Collection is open whenever the Main Library is open: Monday – Thursday, 9 a. m. – 9 p.m; Friday and Saturday, 9 a.m. – 6 p.m.; and Sunday, 2 – 4 p.m

- Judith Soniat and Ross Mays

Tuesday, June 14, 2011

Flood Control vs. Coastal Erosion: Finding A Balance

As most of the people in Terrebonne Parish know very well, managing the Mississippi River can be a big problem. Levees and other flood control structures have made catastrophic floods less common than they once were, but there is a downside to keeping the river on a tight leash: as disastrous as floods can be, they are what created southeast Louisiana.

Before the levees and spillways were built, land here was created when the Mississippi and its tributaries and distributaries (offshoots) overflowed their banks every year, depositing layer after layer of sediment. While land was perpetually created in this way, it was also perpetually destroyed by subsidence and erosion. For thousands of years, these two opposing forces maintained a dynamic balance. The pattern of dry land and wet land shifted with the changing river channels, but the total amount of land stayed roughly the same.

This balance was destroyed when people began to prevent the Mississippi River from flooding, by building levees and other flood control systems. Since we learned to prevent most floods, the river almost has stopped depositing sediment. Subsidence and erosion keep destroying land, as they have for millennia, but the Mississippi isn't allowed to build it back again.

The amount of land lost in the last hundred years is truly mind-boggling. Since 1932, Louisiana has lost over 1,800 square miles of land--an area about the size Terrebonne Parish. Currently, our coast loses about a football field of land every 45 minutes. It's obvious that this is a huge problem, but it's not obvious what to do about it. We can't just knock down the levees and let the Mississippi go back to its old ways. Its method of creation is just too destructive. The challenge is to find ways to allow the river to create new land, but in a controlled way.

Because this is such a complex issue, the Terrebonne Parish Library Reference Department will be present a series of blog posts about it, discussing the best places to find reliable information. For now, we would like to mention three excellent introductory resources:

To get a sense of just how much the Louisiana wetlands have changed in the last few decades, take a look at the "before and after" image that appears in this article in the Huffington Post. Moving your mouse across this image will show how much the landscape has changed from 1973 to 2010.

If you want a more detailed view of wetlands loss, the US Geological Survey has just published a new map showing where and when land has been lost since 1932. Red, orange, and yellow areas of the map show land lost before 1980, while blue and purple areas show land lost since then. A couple of small green areas show how the Atchafalaya River has begun to create new wetlands and deltas in Atchafalaya Bay.

For an excellent overview of the geologic processes that created southeast Louisiana, and the processes that are now threatening to destroy it, check out this excellent animated tutorial from the New Orleans Times-Picayune.

If you would like to find out more about this topic, please contact the Terrebonne Parish Library's Reference Department. We can show you a wide range of books, videos, articles, and websites to help you understand the issues. We'll also be focusing on some of these great resources in future blog posts, so stay tuned!