Formation mechanism and optimization of the reverse logistics model of domestic waste in the farming-pastoral ecotone
Reverse logistics of domestic waste is a critical link in the domestic waste treatment within villages and towns.Hence,revealing the formation mechanism of reverse logistics models and establishing a cost-effective reverse logistics system for domestic waste treatment plays a pivotal role in the stabilization of the ecological security and improvement of the living environment of urban residents,farmers,and herdsmen in the farming-pastoral ecotone.This study analyzed the disequilibrium of the level of waste treatment at multiple scales based on a multi-source heterogeneous dataset of 1499 village settlements,taking Haidong city as an example.Further,the determinants of the spatial variation of domestic waste reverse logistics models were clarified by using a multinomial logistic regression model.Lastly,the spatial optimization of the reverse logistics model was proposed based on the evaluation of the spatial accessibility of waste treatment facilities by the improved potential model.The results show that the level of domestic waste generation was relatively low in Haidong,with the distribution of domestic waste characterized by an overall pattern of"locally clustered,globally dispersed".The level of waste treatment was unable to meet the demand of residents,with a pattern of decrease from the urban areas of the valley of the Huangshui River to the surrounding farmers'settlements and remote herdsmen settlements.In addition,the alpine environment and the fragmentation of village settlements of the farming-pastoral ecotone were the underlying reasons that hindered the implementation of the centralized logistics model.Moreover,village settlements with a small resident population and poor socio-economic development usually belonged to disadvantaged regions for the implementation of the centralized logistics model.Besides,the increase in the number of grass-roots cadres and the decrease in the average age contributed to implementing the decentralized logistics model.At last,the overall spatial accessibility of waste treatment facilities in rural areas of Haidong was primarily low.It is recommended to adopt a comprehensive optimization strategy that combines decentralized and centralized logistics models and implement three optimization models:centralized logistics in the city,diffusional logistics in the townships,and decentralized logistics in the farming and pastoral areas.Aiming at minimizing logistics costs and eliminating environmental stress in waste treatment,the main policy implications according to the characteristics of logistics nodes are as follows.Greater efforts are needed to enhance the function of coordinating hardware and software facilities for waste transportation in the county,promote effective collaboration in waste treatment at the town level,strengthen the village-level functions of source separation and local elimination of waste,and ultimately establish a reverse logistics system of domestic waste that focuses on waste reduction,resource utilization,and harmless treatment.
domestic wastereverse logisticsspatial variationformation mechanismfarming-pastoral ecotoneHaidong city,Qinghai province
万方数据
维普
