基于三维地形路网的农田生物质运输路线损耗评价方法OA

Aiming to account for the effects of terrain undulation and road detours that cannot be adequately reflected by two-dimensional route distance in farmland biomass transportation,a route equivalent loss evaluation method was proposed based on a three-dimensional terrain road network.Taking Fuping County,Hebei Province,as the study area,farmland-adjacent transportation origins were identified by using farmland distribution and road network data,and a three-dimensional terrain road network was constructed through road centerline densification and DEM elevation assignment.Cumulative elevation gain,cumulative descent,slope disturbance intensity,and road network tortuosity were extracted as loss factors to establish an equivalent loss distance model.Two-dimensional route estimation bias was evaluated by using the two-dimensional underestimation rate and route loss increase rate.Results for 18 typical routes showed that the underestimation rate ranged from 6.90%to 22.92%,averaging 11.22%,while the route loss increase rate ranged from 7.42%to 29.73%,averaging 12.87%.The increase in three-dimensional geometric length was small,and the equivalent loss increase was mainly affected by cumulative elevation gain,downhill control,slope disturbance,and road network tortuosity.The method can provide a reference for route optimization and energy consumption assessment in farmland biomass transportation.