A Simplified Monitoring Method for Road-Deposit Environments

Abstract

To clarify environments of road deposits, one of non-point sources in urban area ,we present a simplified monitoring method for road-deposit environments in which one can easily obtain road deposits under simulated rainy conditions . The present method collects road deposits suspended in water by a simple operation in a short time and then analyze water qualifies for samples obtained here . With the present method, we conduct a field observation in urban area before and after a hydrologic event , and then examine the variations of suspended solids and particulate matter on road through the hydrologic event We also conduct field measurements to clarify horizontal distributions of deposits on road. The observed results indicate that the spatial fluctuations of deposits on road are dominant , showing the importance of the simplified monitoring method for road-deposit environments presented here .