英文字典,中文字典,查询,解释,review.php


英文字典中文字典51ZiDian.com



中文字典辞典   英文字典 a   b   c   d   e   f   g   h   i   j   k   l   m   n   o   p   q   r   s   t   u   v   w   x   y   z       


安装中文字典英文字典辞典工具!

安装中文字典英文字典辞典工具!










  • Trail Basics: SET Water Diversion Features - conovers. org
    Stone water bars, particularly the giant dragon’s teeth version, are not traversable, so people walk around them (as seen in this photo with the path created to the left), creating a way for the water to go around the water bar as well as widening the trail
  • Waterbars: Do-It-Yourself Conservation Practices
    Purpose: A waterbar intercepts water traveling down footpaths, trails and other areas and diverts it into stable vegetated areas Installation: Install waterbars on moderately steep paths with concentrated flows Select a location where the waterbar outlet can drain to a stable, vegetated area
  • Trail Construction and Maintenance Notebook, 0023-2839-MTDC, Surface . . .
    Think of your waterbar (wood or rock) as a backup to a dip in the trail Dig the bar first Make sure it is seated flush, anchored into the cutslope, and at a good angle Then construct the dip and outlet to match For rock waterbars, use rectangular rocks, "chunkers," butted together, not overlapped
  • Chapter 26. - Drainage and Structure Maintenance. Final
    Many trails have drainage structures, such as water bars, drain dips (grade reversals), and rolling grade dips These structures are usually installed to direct water off a trail
  • 0723-2806-MTDC: Trail Construction and Maintenance Notebook
    Dig the drain deep enough to ensure that the water will flow off the tread Feather the edges of the drain into the tread so trail users don't trip Plant rocks or other large stationary objects (guide structures) along the lower edge of the tread to keep traffic in the center
  • Water Bars | Reduce Driveway Trail Washouts | Erosion
    How I reduced washouts on steep gravel drives and trails using water bars This is a very basic way solve what can be a troublesome issue Logging trail washouts can lead to loss of soil
  • How To Correctly Construct A Waterbar
    ush creates an outlet for the water Water should be diverte into undisturbed forest leaf litter The leaf litter can then filter the sediment and dispers structed in approximately 2 minutes It should exten beyond both sides of the skid trail The waterbar should be angled at 30-45° and shou
  • Course 203. Waterbars and Checks - Pacific Crest Trail Association
    Waterbars have been built for decades and until recently were constructed so that running water was deflected off the trail by directly hitting the rock or log bar


















中文字典-英文字典  2005-2009