Alguém já usou a ferramenta stream order spatial analyst para rede de esgoto?

Question

<\/HEAD>Estou trabalhando em um projeto de análise de esgoto para escola\/trabalho e estou tentando ordenar a rede de esgoto usando a ferramenta stream order networking, mas estou obtendo resultados muito confusos. Consigo criar uma grade raster para a rede de esgoto; no entanto, não consigo criar um raster de direção de fluxo preciso. Os valores para direção do fluxo não fazem sentido para mim. Tenho algumas capturas de tela abaixo que mostram os resultados.<\/P> <\/P> Se alguém tiver alguma experiência com essas ferramentas e puder fornecer algum feedback, seria muito apreciado. <\/P> <\/P> <\/P> <\/P> <\/P> <\/P> <\/P><\/BODY><\/HTML>

HowardCrothers · Answer

You might be able to use the Summary Flow Accumulation tool on the Water Utility Network Reporting toolbar to get at the answer.  Requires your data to be in a geometric network.  You could use it sum the number of upstream manholes for each pipe and use that a proxy or if you have customer connections you could assign a weight to each connection and accumulate that for each upstream pipe. Water Utility Network Reporting toolbar - Water Utility Network Editing and Analysis | ArcGIS Solutions for Water

EricSwett · Answer

Howard,

Thank you for your reply. I currently have a vector sewer network, but I am trying to identify the pipes in the system as first, second, third-order pipes. I have data from our hydraulic sewer model, which shows flow data, but I want to be able also to see which pipe segments have "upstream branches" and how many branches are upstream.

I haven't been able to find a vector stream ordering tool so I was trying to see if I could convert the vectors into rasters and use the tools, but no luck.

Thanks,

Eric

HowardCrothers · Answer

Not sure exactly what your project is, but the hydrology tools like Stream Order and Flow Direction are used to analyze surface flow across a continuous surface, like a DEM.  So those tools are typically used for surface water, not for pipes.

The first bullet point under Usage sounds like the results you are experiencing if you turned your pipes into a raster - Stream Order—Help | ArcGIS Desktop

Most organizations represent their sewer system using vector data (typically a network) and use that vector data to perform analysis.