Použil někdo nástroj stream order spatial analyst pro kanalizační síť?

Question

<\/HEAD>Pracuji na projektu analýzy kanalizace pro školu\/práci a snažím se uspořádat kanalizační síť pomocí nástroje stream order networking, ale dostávám velmi matoucí výsledky. Mohu vytvořit rastrovou mřížku pro kanalizační síť; nicméně nemohu vytvořit přesný rastrový směr toku. Hodnoty směru toku pro mě nedávají smysl. Níže mám několik screenshotů, které ukazují výsledky.<\/P> <\/P> Pokud má někdo zkušenosti s těmito nástroji a může poskytnout zpětnou vazbu, byl bych velmi vděčný. <\/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.