scholarly journals Enhanced surface water flood forecasts: User‐led development and testing

2021 ◽  
Author(s):  
Cathryn E. Birch ◽  
Benjamin L. Rabb ◽  
Steven J. Böing ◽  
Kay L. Shelton ◽  
Rob Lamb ◽  
...  
Keyword(s):  
Surface Water ◽  
Enhanced Surface

Biochar for Enhanced Surface Water Quality

2021 ◽  
Author(s):  
Kristopher Bosch ◽  
Amber Freebourn ◽  
Kelsey Parker ◽  
Mami Scherman ◽  
Katherine R Zodrow ◽  
...  
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Surface Water Quality ◽  
Enhanced Surface

Enhanced surface water treatment by ultrafiltration

Desalination ◽  
1998 ◽  
Vol 119 (1-3) ◽  
pp. 113-125 ◽  
Author(s):  
J.A.M.H. Hofman ◽  
M.M. Beumer ◽  
E.T. Baars ◽  
J.P. van der Hoek ◽  
H.M.M. Koppers
Keyword(s):  
Water Treatment ◽  
Surface Water ◽  
Surface Water Treatment ◽  
Enhanced Surface

scholarly journals The Benthonic foraminiferal response to changing substrate in Cenomanian (Cretaceous) rhythms induced by orbitally-forced surface water productivity

1992 ◽  
Vol 11 (2) ◽  
pp. 107-111 ◽  
Author(s):  
Paul N. Leary ◽  
Malcolm B. Hart
Keyword(s):  
Surface Water ◽  
Oxygen Isotope ◽  
Water Productivity ◽  
Systematic Variation ◽  
Orbital Forcing ◽  
Foraminiferal Assemblage ◽  
Isotope Signature ◽  
Southern England ◽  
The Mean ◽  
Enhanced Surface

Abstract. The rhythmic sedimentation of Cenomanian age in Southern England is most likely the result of orbital forcing (precession). The oxygen isotope signature and the foraminiferal assemblage from detailed (5cms), continuous samples through three of these rhythms show systematic variation with lithology. The marls yield cooler surface water palaeotemepratures with high benthonic diversities, low planktonic:benthonic ratios and the planktonic assemblage contains around 5–10% rotaliporids. The chalks yield warmer surface water palaeotemperatures with low benthonic diversities, high planktonic:benthonic ratios and the planktonic assemblage contains 1–4% rotaliporids. This indicates that the chalks represent enhanced surface water productivity induced by increased surface water palaeotemperature. Three groups (Tritaxia pyramidata Reuss, Gavelinella spp. and Lenticulina spp.) together form over 90% of the benthonic assemblage. Each >250μm assemblage exhibits a systematic variation in size with lithology. The mean sizes are smallest and the maximum sizes of the moving populations decrease in the middle of the chalks. This may be a consequence of three different factors, (a) during intervals of increased productivity (chalks) the benthonic foraminifera may be achieving gametogenesis at an enhanced rate due to the increased availability of food supplies, or (b) the increased productivity may cause dwarfism within the micro-benthos, or (c) the effects of current winnowing prior to burial. The relative merits of each of these possibilities are discussed.

Application of a Simple Cold Stub to the Direct Observation of Frozen Hydrated Sand

1973 ◽  
Vol 31 ◽  
pp. 212-213
Author(s):  
John M. Wehrung ◽  
Richard J. Harniman
Keyword(s):  
United States ◽  
Surface Water ◽  
Direct Observation ◽  
Controlled Study ◽  
Clay Particles ◽  
Organic Debris ◽  
Rock Formations ◽  
Water Tables ◽  
Permeable Rock ◽  
Natural Means

Water tables in aquifer regions of the southwest United States are dropping off at a rate which is greater than can be replaced by natural means. It is estimated that by 1985 wells will run dry in this region unless adequate artificial recharging can be accomplished. Recharging with surface water is limited by the plugging of permeable rock formations underground by clay particles and organic debris.A controlled study was initiated in which sand grains were used as the rock formation and water with known clay concentrations as the recharge media. The plugging mechanism was investigated by direct observation in the SEM of frozen hydrated sand samples from selected depths.

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