| Popis: |
A procedure was developed to estimate the design elevations for a terrace channel bottom by varying channel grade and using a cut and fill method. Mathematical equations were derived to evaluate the cut and fill requirements for broad-base, grass-backslope, and narrow-base terrace cross-sections. Equations were also developed to estimate relative earth movement or efficiency for a straight blade bulldozer, a universal blade bulldozer, and scraper equipment. The equations were the basis of a computer program that was developed to design and evaluate the terrace channel profile and cross-section. The program was evaluated using terrace input data from northeast Nebraska. |
