• Catalog Record

    Water-resources investigations in Iowa, 1978 / Catalog Record Only

    Panel title. Includes text and tables. Includes bibliographies. Hydrologic-data station activities and investigations in progress in Iowa, as of March 1978 -- Flood-prone area maps completed in Iowa -- Average annual runoff, in inches -- Normal annual precipitation, in inches, 1941-70 -- Average discharge of the principal rivers -- Availability of ground water -- Surface water conductance -- Areas where water with the minimum ...

    • Contributor: Geological Survey (U.S.)
    • Original Format: Maps
    • Date: 1979
  • Catalog Record

    Hydrologic unit map--1974, State of Iowa. Catalog Record Only

    Scale 1:500,000; 1 in. equals approx. 8 miles. Relief shown by spot heights. "Lambert conformal conic projection based on standard parallels 330 and 450." "Base map drainage modified in 1974." Base map "Compiled in 1965. Edition of 1966." Includes text and table of hydrologic units. col. map 75 x 112 cm. fold. in envelope 30 x 24 cm.

    • Contributor: Geological Survey (U.S.)
    • Original Format: Maps
    • Date: 1976