街道地表物的累积与污染特征：以成都市为例

本文研究了成都市区74km~2范围内地表物的累积规律和污染特征.结果表明,街道地表物累积受土地用途影响;地表有机物受人类活动的影响;重金属受城市交通的影响.粒径分布研究发现街道地表物小于360μm的微粒占70％,且各种污染物主要吸附于细小的微粒上.使用地表污染物边坎累积模型计算了街道地表物和各种污染物的累积量.成都市区每天累积地表物达111吨,BOD,达78kg,COD达411kg,克氏氮6kg和总磷2kg.

Sediment on the Urban Street: Accumulation and Characteristics.

The main purpose of this paper is to research accumulation and characteristics of the street surface sediment in an area of 74 km2 of Chengdu City, the Capital of Sichuan Province. The results showed that the way of land use affected accumulation of sediment, in which organic pollutants come from human activities and heavy metals in it derived from vehiclar traffic. It has been found that the diameters of particles below 360 urn took 70% in the sediment and various pollutants adsorbed on them. By modelling the sediment accumulation near the street curbs, the calculated data are as follows: 111 tons per day of sediment on the streets, COD 412 kg/d, BOD 78 kg/d, K-nitrogen 6 kg/d and total phosphorus 2 kg/d. The data are agreeable to the actual situation.