英文文献：Benefits from Reducing Sediment Deposition in Roadside Ditches
英文文献作者：Ribaudo, Marc O.
英文文献摘要：
State and local highway departments spend portions of their budgets on roadside ditch sediment removal. Reductions in soil erosion would reduce these costs. A damage function developed using state level data indicates that reductions in soil erosion by 1983 programs would reduce state and local highway department costs by $34 million.