ASCE 42-17 PDF Download

Standard Practice for the Design, Conduct, and Evaluation of Operational Precipitation Enhancement Projects, also known as ASCE 42-17, is a standard developed by the American Society of Civil Engineers (ASCE) to provide guidance on the design, execution, and evaluation of cloud seeding projects. The standard emphasizes the use of cloud seeding technologies to enhance precipitation by converting atmospheric water vapor into rainfall or snowfall.

ASCE 42-17 begins with an introduction to the history and technology of cloud seeding, providing a scientific basis for examining the efficiency of both natural precipitation and induced weather modifications. It covers various design aspects of precipitation enhancement projects, including project scope, seeding agents, targeting and delivery methods, meteorological data, equipment deployment, legal considerations, and environmental concerns.

The standard also addresses operational issues such as personnel requirements, decision-making processes, communication protocols, safety measures, and public relations. Furthermore, it outlines the components of project evaluation, including design constraints, evaluation measures, and the dissemination of results.

ASCE 42-17 is an updated version of the previous standard, ASCE/EWRI 42-04, incorporating the latest advancements in science, engineering, and technology since 2005. The standard is organized to present mandatory provisions and nonmandatory commentary, streamlining and revising all sections to better align with project operations. It also places a stronger emphasis on warm cloud seeding throughout.

Engineers and government regulators involved in water resources management and weather modification can rely on ASCE 42-17 for current guidance on cloud seeding technologies. Adhering to this standard can lead to improved efficiency, cost savings, and enhanced decision-making in operational precipitation enhancement projects.