Technical manual for erosion and sediment control in urban areas of developing countries

This manual provides practical guidelines and technical materials to assist A.I.D. and host country officials engaged in land development projects to prevent such uncontrolled storm runoff. Section I provides the basic procedural methods and guidelines needed to incorporate erosion and sediment control -- essential to reducing the destructive effects of runoff -- into the planning, design, and construction of a project. Critical management decisions and construction field practices which should be included in effective erosion and sediment control programs are presented in Section II. Section III describes and recommends specific control strategies for five typical runoff-related problems involving steep or long gradual slopes, street and adjacent ditch drainage, waterways and streams, site and lot grading, and infrastructure. In Section IV, the authors summarize the basic design criteria which should be considered in planning the utilization of a prospective site with regard to stormwater drainage. Finally, Section V presents the technical guidelines needed by site planners, engineers, and construction personnel to ensure the proper use, design, construction, and maintenance of the most commonly used erosion and sediment control devices. The manual is highlighted by diagrams and tables. Appended are designs for a sediment basin and a pipe spillway, runoff coefficients for use in a formula measuring watershed runoff, Manning coefficients for a formula to measure discharge, data on parabolic channel design, and symbols used in erosion and sediment control practices.