راهنماي طراحي و انتخاب موادو مصالح براي زهكشهاي زيرزميني
راهنماي طراحي مواد و مصالح براي زهكشهاي زيرزميني را ارائه مي‌نمايد.
مواد و مصالح مورد بحث در اين نشريه شامل پوششهاي دانه‌اي و مصنوعي بوده و لوله‌هاي سفالي، بتني و پلاستيكي را در برمي‌گيرد.
اين نشريه مي‌تواند راهنماي مناسبي براي مهندسان طراح شبكه‌هاي زهكشي باشد تا بتوانند بسته به شرايط منطقه بهترين مواد و مصالح را انتخاب نمايند.
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