VS for Highways - Drainage
Dec 7, 2006Public
Photo: AUS-HYDR 01 - Australia Drainage problems are probably the most damaging to roads, either because they are not properly constructed or they are not maintained, as in this picture showing a culvert drain becoming a major gully that will eventually cut back into the road
Photo: MAD-HYDR01 Madagascar. If bridge abutments are not properly maintained and stabilized the bridge may collapse or become a stand alone impassable structure
Photo: SEN-HYDR01 - Senegal - If road side drains are not properly maintained they quickly fill with upslope detrius - top left - and subsequently rainwater floods the road and will ultimately damage it
Photo: AUS-HYDR02 - Australia this culvert and drain if protected by vetiver would assure protection of this road
Photo: AUS-HYDR03 - Australia this culvert and drain protected by vetiver
Photo: AUS-HYDR04 - Australia this culvert and road fill protected by vetiver. Vetiver is an ideal way of strengthening the interface of soil and concrete
Photo: AUS-HYDR05 - Australia this culvert and road fill should be protected by vetiver
Photo: PHL-HYDR01 Philippines - This culvert/fill interface has been protected with vetiver
Photo: AUS-HYDR05 - Australia this large culvert is being undercut. It should be reshaped and protected with vetiver
Photo: AUS-HYDR06 - Australia this large culvert is now protected by vetiver
Photo: MLA-HYDR01 - Malaysia. Some of Malaysia's large expressways have associated major culverting needs to assure removal of flood water through cross drainage systems. This and the following image shows the treatment of such drains with vetiver
Photo: MLA-HYDR02 - Malaysia. Some of Malaysia's large expressways have associated major culverting needs to assure removal of flood water through cross drainage systems. This and the following image shows the treatment of such drains with vetiver. Highway is to the left of image
Photo: MLA-HYDR03 - Malaysia. Some of Malaysia's large expressways have associated major culverting needs to assure removal of flood water through cross drainage systems. This and the following image shows the treatment of such drains with vetiver
Photo: MLA-HYDR04 - Malaysia. Some of Malaysia's large expressways have associated major culverting needs to assure removal of flood water through cross drainage systems. This and the following image shows the treatment of such drains with vetiver
Photo: MLA-HYDR05 - Malaysia. Some of Malaysia's large expressways have associated major culverting needs to assure removal of flood water through cross drainage systems. This and the following image shows the treatment of such drains with vetiver
Photo: MLA-HYDR06 - Malaysia. Some of Malaysia's large expressways have associated major culverting needs to assure removal of flood water through cross drainage systems. This and the following image shows the treatment of such drains with vetiver
Photo: MLA-HYDR07 - Malaysia. Some of Malaysia's large expressways have associated major culverting needs to assure removal of flood water through cross drainage systems. This and the following image shows the treatment of such drains with vetiver
Photo: MAD-HYDR02 Madagascar - A culvert in a rural road that annually disappeared. Once stabilized with vetiver, this last one has withstood 3 cyclones and 8 rainy seasons
Photo: ELS-HYDR01 - El Salvadore This type of VS protection at the fill /culvert interface is essential if road washouts are to be avoided at the time of heavy flooding
Photo: ELS-HYDR02 - El Salvadore This type of VS protection at the fill /culvert interface is essential if road washouts are to be avoided at the time of heavy flooding
Photo: ELS-HYDR03 - El Salvadore This type of VS protection at the fill /culvert interface is essential if road washouts are to be avoided at the time of heavy flooding
Photo: AUS-HYDR07 - Australia this large culvert is now protected by vetiver
Photo: AUS-HYDR08 - Australia this culvert is now protected by vetiver
Photo: AUS-HYDR09 - Australia this inflow end of a culvert is protected by vetiver. This should help keep large objects and sediment from blocking the culvert