Laserfiche WebLink
L7rl~versity Terrace <br /> If the county takes what was naturally sheet flow and directs it into <br /> channels at ever-higher elevations, won't that just make problems worse for <br /> people living downstream by adding to the volume of water in streams at <br /> lower elevations`? <br /> The question was posed to Ben Ishu of the county Department of Public <br /> Works. Ishii is the county engineer working most closely with the Corps of <br /> Engineers in designing future flood control projects. <br /> Ishii responded by pointing out that sooner or later, most sheet flow ends <br /> up in drainage channels such as Waiakea and Alenaio anyway. Directing <br /> flows to the channels upstream would not create any real problem, he said. <br /> "You could inci-rase both the vohime and peak flows ifyou induce nu~~ r~ <br /> water to come into the channel at the peak ~flola~ time. You could be <br /> producing a double whanuny." -Ri~kFoi~rt~rine, U.SC~S <br /> Yet Fontaine of the USGS had a slightly different take. "Anytime you put <br /> in an artificial channel to direct or deter runoff, you're probably reducing <br /> the time it takes the water to get to the channel," he said. "So you have a <br /> timing issue as well, now. If you have a heavy rain in the watershed, your <br /> peak flow wID occur at a certain time that has to do with how long it takes <br /> water to get into the channel. Depending on how you alter the natural <br /> timing, you could lower or raise peak flows. You could increase both the <br /> volume and peak flows ifyou induce more water to come into the channel <br /> at the peak flow time. You could be producing a double whammy, because <br /> you make that water get into the channel faster than it otherwise would." <br /> On the other hand, Fontaine added, if the planning were done right, "you <br /> could also reduce peak flows" by adding artificial channels. <br /> In the meantime, draft revisions to the Hawaii County General Plan would <br /> steer the county in the direction of greater flood plain protection and other <br /> more natural ways of protecting structures against floods. Whether the <br /> result will be anything more than exhortatory is in the face of pressure <br /> from the Corps of Engineers, the Department of Public Works, and the vast <br /> army of private and public agencies whose livelihood depends on harder <br /> solutions anyone's guess. <br /> Patricia Tummons <br /> According to Peter Boucher, who is in charge of sewers for the County of Hawaii, <br /> approximately forty percent of Hilo is on cesspools. The US Forest service is constructing <br /> a huge building neaz the University of Hawau HIlo. They were required to put in a septic <br /> system because the sewer system in that azea (near the proposed University Terrace) was <br /> inadequate. It seems to me that before we give permission to build University Terrace the <br /> County needs to invest millions of dollars and many years into expanding and improving <br /> <br /> our inadequate sewer system. <br /> <br />