Abstract: Rainfall simulation studies were conducted in conjunction with the Denver Regional Urban Runoff Program to: (1) Compare runoff quantity and quality from two different intensities of rainfall on impervious plots having identical antecedent conditions, (2) document a first flush of constituent loads in runoff from 1,000-square-foot streetsurface plots, (3) compare runoff characteristics from a street surface subjected to simulated rainfall with those from a 69-acre urban basin of mixed land use subjected to natural rainfall, (4) perform statistical analysis of constituent loads in the runoff with several independent variables, and (5) compare the quantity and quality of runoff from 400-square-foot plots of native grasses used for pasture and subjected to simulated rainfall with that from a 405-acre basin covered with native grasses used for pasture and sub-jected to natural rainfall. The rainfall simulations conducted on the street surface showed that higher intensity simulated rainfall produced a higher percentage of runoff than lower intensity rainfall. A first flush of constituent loads occurred for most constituents in the runoff from most rainfall simulations on the street surface; however, a first flush did not occur in the runoff from simulated rainfall on the pasture. The event mean concentrations of constituents in the …

Abstract: The U.S. Geological Survey maintains a quality-assurance program based on the analysis of reference samples for its two water-analysis laboratories located in Atlanta, Georgia, and Denver, Colorado. Reference samples containing inorganic constituents are prepared at the U.S. Geological Survey's Ocala, Florida office and disguised as routine samples, and sent daily to each laboratory through other U.S. Geological Survey offices. The results are permanently stored in the National Water Data Storage and Retrieval System (WATSTORE), the U.S. Geological Survey's data base for all water data. These data are analyzed statistically for precision and bias. The results of these statistical analyses are presented for data collected during the 1981 calendar year. In addition, one sample containing known concentrations chlorophyll a were analyzed in both laboratories, and these results also are presented.

From abstract: This report describes a refined, two-dimensional graph-plotting program that was developed for use on Tektronix 4050-series graphics computers.

From purpose and scope: The purpose of this report is to present an analysis of the August 14, 1980, rainstorm in Denver, Colorado, and describe its effects on the South Platte River and six of its tributaries (figure 1).

Newspaper clippings of an article about WASP members, including Grace Birge Mayfield, Mary Macabe, Kristine Lent, Alice Riff, Ann Oliver, Ann Criswell Adden, Verda Mae Jennings Lowe, Betty Haas Pfister, Florene Miller, Millicent Young, and Barbara Flemming Foss. The article discusses the personal experiences of the women serving in WWII. On the back of the clippings, there is an advertisement for a drapery shop and an article on catalog ordering.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.

Interview with Paul E. Papish, a Navy WWII veteran and POW from Denver, Colorado, who survived the sinking of the USS Houston (CA-30). Papish discusses joining the Navy in 1939 and training, assignment to the Houston and operations in the Pacific, the start of war and initial engagements, the Battle of the Java Sea, getting sunk at Sundra Strait, surviving on a raft and reaching shore on Java, capture, initial internment, transfer to and experiences in Bicycle Camp in Batavia, transfer to Changi Camp in Singapore, and liberation.

Scrapbook documenting the personal life and travels of John Logan Briggs Jr. between 1987 and 1991, including color photographs, tickets, menus, business cards, receipts, clippings, stickers, and other records of travel. John Logan Briggs Jr. is the creator of "The Experience," a self-discovery workshop for the LGBT community. This scrapbook also documents his time spent with friends and family.

Photograph of two older gentlemen standing on a fire escape and looking off into the distance. This print is titled, "Parade Watching, Denver," c. Wehman, 1985.