基于三维地形路网的农田生物质运输路线损耗评价方法

Route-loss Evaluation Method for Farmland Biomass Transportation Based on Three-dimensional Terrain Road Network

摘要:

针对二维路径距离难以反映农田生物质收储运输中地形起伏和道路绕行影响的问题，提出基于三维地形路网的路线等效损耗评价方法。以河北省阜平县为研究区，基于农田分布和道路网络筛选农田邻近运输起点，通过道路中心线加密采样和DEM高程赋值构建三维地形路网。提取累计爬升、累计下降、坡度扰动强度和路网曲折度等损耗因子，建立路线等效损耗距离模型，并采用二维低估率和路线损耗增幅评价二维路径估算偏差。18条典型路线分析结果表明，二维低估率为6.90%～22.92%，平均值为11.22%;路线损耗增幅为7.42%～29.73%，平均值为12.87%。三维几何长度增幅较小，等效损耗增加主要受累计爬升、下坡控制、坡度扰动和路网曲折影响。研究结果可为农田生物质运输路线优化和能耗评估提供参考。

Abstract:

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.