|
IT is time for Houston to start thinking and acting
differently with regard to flood control. We are not thinking
broadly or comprehensively enough about flood control. We are
not providing the information that our citizens need to live
and survive in a flood-prone area.
The first notion we need to eliminate is that we can
"control flooding" in Houston. Houston is located in
an area that receives tremendous amounts of rain. We got as
much as 23 inches in 12 hours during Allison's return on
Friday, June 8, and Saturday, June 9. However, that is not the
most rain for this area. Alvin, to the south of Houston,
received 43 inches of rain in 24 hours with tropical storm
Claudette in 1979. We commonly receive six to eight inches
over 12 hours. We can improve drainage. But it is truly
difficult to control flooding here, given the large amount of
rainfall we get and given certain decisions that were made
decades ago in this community.
It is important to know what our drainage system is and is
not designed to accomplish. All aspects of our drainage system
are not designed to accommodate the huge storms that we
frequently get. Our underground storm sewer system can handle
only an inch or two of rain and then our streets are converted
into the drainage system as part of the city's and the
county's drainage plan. That is why our streets flood - our
leaders designed the drainage plan that way.
When the streets fill up, the water comes over the curbs
and into the yards. If you are unfortunate enough to have a
home with a floor slab that is at the same height as the curb,
you will probably flood in Houston. Any storm greater than a
25-year storm - approximately six inches in 12 hours - will
probably cause the street to spill into your yard and perhaps
your home.
When the streets fill up, water starts flowing from high
points to low points. The road system becomes a river system,
and the water follows the new channels to lower ground. It is
no surprise that the Medical Center flooded. It is near Brays
Bayou and the elevation there is slightly lower than in areas
to the north and west. The flooded streets simply followed
elemental rules of physics and flowed toward Brays Bayou, the
topographic low point. These waters came to rest at the
Medical Center adjacent to the bayou.
This brings up an important point. Although there are maps
showing flood plains in Houston, the flood-plain maps do not
show all areas that flood. They only show areas that flood
from streams overflowing their banks. They do not show
flooding caused by streets filling up with water and then
flooding people's homes. Many of the flood-plain maps are
incorrect with respect to stream flooding. Our leaders know
this information, but they have been slow to demand that the
maps be fixed, worrying about the impact of flood plains on
development and public perception rather than focusing on
providing the best information possible to residents.
If you did not know the facts above, it is reasonable to
ask why not? In my opinion, the reason is that Houston's
leaders have always been unwilling to admit that we had a
major flooding problem, generally being more concerned about
expanding the new development in the suburbs than about
helping residents survive flooding. We must adopt a different
perspective on flooding.
The most important first step is to admit that we flood and
that in many cases we cannot "control" this
flooding. Instead, we must learn to live with this flooding,
even as we try to minimize it. In my opinion, our leaders
understand this important concept.
Our city and county should be at the forefront of alerting
the citizens to the facts about living in Houston and Harris
County and flooding. There should be a publication issued
called "Facts About Houston Flooding and Surviving A
Flood." A consumer should be able to obtain excellent
information from either the city or the county. Yet, at this
time, important information is hard to obtain.
Rather than trying to minimize the need for flood
insurance, our government should urge all residents to
purchase flood insurance. This is the best buy around for the
consumer. Many of us assume that simply because we are not
shown in a 100-year flood plain, we are safe. That is not
true. These maps are notoriously inaccurate and do not show
flooding from the streets into the yards and houses.
The government should take the lead in ensuring that our
flood-plain maps are correct and up-to-date. There are several
bayous, such as Brays, that our government officials know to
have larger flood plains than are currently shown on the maps.
These maps should be issued in correct form as soon as
possible.
Additionally, our local governments should attempt to
identify areas that flood often, although they are not
officially identified on the flood-plain maps. There are some
areas that simply have poor drainage or that were constructed
without an adequate elevation of the floor slab above the
street. Many of these areas are well known. This information
should be available to citizens and consumers in map form.
Either the city or the county or the state should identify
streets and freeways that often flood and the amount of
rainfall that floods them. Certain roads flood each time it
rains. We lose our cars. Occasionally, we lose lives. We must
begin to think pro-actively about flooding and transportation.
How many times do 18-wheelers need to float at I-10 and
Washington before we learn that, at the least, the road should
be closed at times?
Many of the homes that flooded recently have flooded before
- some five, six, seven, eight or more times. We should buy
these homes out and tear them down. We may be able to provide
better drainage for many areas, and we should try, but some
areas are too close to the bayous and too flood-prone to save.
Let's be fair and smart but swift. Buy these homes out and
remove their owners from peril.
An ordinance should be passed that requires hospitals and
public buildings to remove emergency equipment from basements.
The Medical Center lost power in 1976 because of flooding,
just as it did in 2001. The downtown business district was
shut down. These events should not be allowed to happen again.
It will cost money to address these problems but the ordinance
would prevent individual institutions from making the same
wrong decisions again, just to save money.
We need to stop "crying wolf" about unprecedented
rainfall amounts hitting Houston. Our 2001 storm was big, but
Claudette in 1979 was bigger. The 1998 rainfall from Tropical
Storm Frances that flooded White Oak Bayou was called an
unprecedented or 100-year rain (it was not), just as the
Greens Bayou floods of 1989 and 1992 were also called
unprecedented (they were not). The fact is, we get big rains
in Houston. We must live with them and not use them as
excuses. We should, however, plan for bigger rains than are
currently used by the flood control district and the city.
We need to look seriously at how we are spending public
money right now. Harris County lacked adequate money to
provide flood-control improvements on upper White Oak Bayou in
the early to mid-'90s and failed to complete the Pate Plan for
White Oak Bayou. Today, there is not enough money to buy out
the areas that flood over and over, even with federal help. We
need more money for buy-out of flooded housing.
It is reasonable to ask how we are spending our county
money. We have provided over $600 million in bonds for a Port
of Houston Container Port that will end up costing $1.3
billion in public money, even though a private
company is trying to get a permit to build the same type of
port on Galveston Bay at Texas City. This port is proposed to
be built with private money at no cost to taxpayers and will
provide jobs in the region. Why do Harris County citizens need
to provide public money when this private port proposal is
viable? Why don't we transfer that money to buy-out of flood
victims?
I am not advocating the elimination of all flood-control
projects. I favor building large basins and reservoirs west
and north of the city to catch the runoff before it enters our
bayous. Addicks and Barker reservoirs are the best
flood-control projects that we have ever built and we need
more like them. However, I am opposed to letting new
development flood older areas. We should focus our effort on
preserving our developed urban areas and pay less attention to
expanding the suburbs, all of which drain down on the
developed areas.
Most of all, however, I am urging humility and reality in
equal doses. We live on a flat coastal plain that gets a lot
of rain. We need to accept the fact that the floods will come
on occasion and come to grips with living these floods.
Ultimately, we will discover that we can coexist with this
flooding and have a quality city. But we will never
"control" the floods.
Copyright
notice: %3B All materials in
this archive are copyrighted by Houston Chronicle Publishing
Company Division, Hearst Newspapers Partnership, L.P., or its
news and feature syndicates and wire services. No materials
may be directly or indirectly published, posted to Internet
and intranet distribution channels, broadcast, rewritten for
broadcast or publication or redistributed in any medium.
Neither these materials nor any portion thereof may be stored
in a computer except for personal and non-commercial use.
|