(Table 1) Deuterium ratios, chloride content and hydrate volume of pore water and hydrate meltwater from ODP Site 164-996

Site 996 is located above the Blake Diapir where numerous indications of vertical fluid migration and the presence of hydrate existed prior to Ocean Drilling Program (ODP) Leg 164. Direct sampling of hydrates and visual observations of hydrate-filled veins that could be traced 30-40 cm along cores suggest a connection between fluid migration and hydrate formation. The composition of pore water squeezed from sediment cores showed large variations due to melting of hydrate during core recovery and influence of saline water from the evaporitic diapir below. Analysis of water released during hydrate decomposition experiments showed that the recovered hydrates contained significant amounts of pore water. Solutions of the transport equations for deuterium (d2H) and chloride (Cl-) were used to determine maximum (d2H) and minimum (Cl-) in situ concentrations of these species. Minimum in situ concentrations of hydrate were estimated by combining these results with Cl- and d2H values measured on hydrate meltwaters and pore waters obtained by squeezing of sediments, by the means of a method based on analysis of distances in the two-dimensional Cl- d2H space. The computed Cl- and d2H distribution indicates that the minimum hydrate amount solutions are representative of the actual hydrate amount. The highest and mean hydrate concentrations estimates from our model are 31% and 10% of the pore space, respectively. These concentrations agree well with visual core observations, supporting the validity of the model assumptions. The minimum in situ Cl- concentrations were used to constrain the rates of upward fluid migration. Simulation of all available data gave a mean flow rate of 0.35 m/k.y. (range: 0.125-0.5 m/k.y.).

Interstitial water chemsitry at DSDP Leg 60 Holes

Interstitial water data obtained during Leg 60 show complex gradients at Site 453 in a sediment pond on the west side of the Mariana Trough. Concentrations of Ca, Mg, Sr, as well as of K and Li, suggest that slightly altered sea water penetrates below the sediments, most likely through brecciated igneous and metamorphic rocks, mainly gabbros, lying at the base of the pond. Interstitial water concentration gradients suggest that reactions involving igneous matter lead to increases in calcium and strontium in the pore fluids and to decreases in magnesium. Upward advection of water through the sediments does not appear to occur, so that the advected sea water most likely penetrates deeper into the breccias, perhaps leading to further hydrothermal activity elsewhere in this area. Interstitial water gradients at Sites 458 (conservative) and 459 suggest that reactions in the sediments and underlying basalts are responsible for increases in dissolved calcium and decreases in magnesium and potassium.

Stilling well design for accurate water level measurement /

"January 1977."

Before the well runs dry : a handbook for designing a local water conservation plan : water conservation project /

Cover title.

Evaluation of a potential well field near Church Rock as a water supply for Gallup, New Mexico /

Prepared in cooperation with the U.S. Bureau of Reclamation.

The jolly angler : or, Water side companion : containing an account of all the best places for angling, as well as the tackle, baits, & other requisites to form an expert angler : with a correct description of tying hooks, making artificial flies, repairing tackle, &c. : the whole illustrated with eighty wood engravings /

Introduction signed: J. March.

The relation between the lowering of the piezometric surface and the rate and duration of discharge of a well using ground water storage /

Mode of access: Internet.

Effect of pumping from a shallow well on the ground-water table /

Mode of access: Internet.

A guide to the selection of materials for monitoring well construction and ground-water sampling /

"August 1983."

Update #3 : Crestwood public water supply groundwater modeling -- bedrock well installation /

"September 11, 2009"

Operator's manual : drilling system, well, rotary, truck mounted, air transportable, 600 feet capacity : model LP-12, NSN 3820-01-246-4276.

Includes index.

Ground-water conditions and well yields in fractured rocks, southwestern Nevada County, California /

Spine title: Ground-water conditions, well yields in fractured rocks, southwestern Nevada County, CA.