Forest biomass is a significant indicator for substance accumulation and forest succession, and a spatiotemporal biomass map would provide valuable information for forest management and scientific planning. In this study, Landsat imagery and field data cooperated with a random forest regression approach were used to estimate spatiotemporal Above Ground Biomass (AGB) in Fuyang County, Zhejiang Province of East China. As a result, the AGB retrieval showed an increasing trend for the past decade, from 74.24 ton/ha in 2004 to 99.63 ton/ha in 2013. Topography and forest management were investigated to find their relationships with the spatial distribution change of biomass. In general, the simulated AGB increases with higher elevation, especially in the range of 80–200 m, wherein AGB acquires the highest increase rate. Moreover, the forest policy of ecological forest has a positive effect on the AGB increase, particularly within the national level ecological forest. The result in this study demonstrates that human activities have a great impact on biomass distribution and change tendency. Furthermore, Landsat image-based biomass estimates would provide illuminating information for forest policy-making and sustainable development.

For improving the crack resistance of the semi-rigid base of an asphalt pavement and self-healing property to the base, the main materials (cement, fly ash, quartz sand, and polyvinyl alcohol) for a polyvinyl alcohol-engineered cementitious composite (PVA-ECC) were added to the regular materials for a new self-healing material for pavement base, i.e., PVA-ECC-stabilized crushed-stone mixture (PECR). Compressive strength tests were conducted on the base materials with various curing times to evaluate self-healing performance by comparing the strengths of standard specimens and specimens with cracking under different conditions (outdoor curing, laboratory curing, and dry-wet circulation). Results of the tests indicate that PECR has superior self-healing performance and that the compressive strength increases by 57.3% after self-healing. The compressive strength of PECR is higher than that of cement-stabilized crushed-tone mixture, and the peak compressive strength increases by 42%. The material that experienced dry-wet circulation has the highest compressive strength and the best self-healing peifcnmance.