Abstract
Abstract. In our study we use 3D scene understanding to detect the discharge of domestic solid waste along an urban river. Solid waste found along the Ciliwung River in the neighbourhoods of Bukit Duri and Kampung Melayu may be attributed to households. This is in part due to inadequate municipal waste infrastructure and services which has caused those living along the river to rely upon it for waste disposal. However, there has been little research to understand the prevalence of household waste along the river. Our aim is to develop a methodology that deploys a low cost sensor to identify point source discharge of solid waste using image classification methods. To demonstrate this we describe the following five-step method: 1) a strip of GoPro images are captured photogrammetrically and processed for dense point cloud generation; 2) depth for each image is generated through a backward projection of the point clouds; 3) a supervised image classification method based on Random Forest classifier is applied on the view dependent red, green, blue and depth (RGB-D) data; 4) point discharge locations of solid waste can then be mapped by projecting the classified images to the 3D point clouds; 5) then the landscape elements are classified into five types, such as vegetation, human settlement, soil, water and solid waste. While this work is still ongoing, the initial results have demonstrated that it is possible to perform quantitative studies that may help reveal and estimate the amount of waste present along the river bank.
Highlights
Due to inadequate infrastructure and service support, residents along river banks in developing cities rely upon rivers for multiple environmental services (Steinberg, 2007; Vollmer and GretRegamey, 2013)
We study the application of 3D scene understanding in detecting discharge of domestic waste along complex urban rivers
We evaluated the application of our proposed method using the case study of Kampung Melayu and Bukit Duri in East Jakarta, two districts situated on either side of the Ciliwung Rivers lower reaches
Summary
Due to inadequate infrastructure and service support, residents along river banks in developing cities rely upon rivers for multiple environmental services (Steinberg, 2007; Vollmer and GretRegamey, 2013) These services include harvesting of plants, direct sanitary use, sewage disposal, recreation, solid waste disposal and groundwater use. This paper focuses on the detection of visible solid waste along the lower reaches of the Ciliwung River in Jakarta, Indonesia. This waste contributes to environmental degradation, including poor water quality, and may be linked to ill health (Marschiavelli, 2008). The ability to identify and monitor point sources of solid waste disposal may aid in the development of strategies to reduce the pollution load
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