scholarly journals Preliminary report on deposit models for sand and gravel in the Cache la Poudre River valley

1999 ◽  
Author(s):  
W.H. Langer ◽  
D.A. Lindsey
Keyword(s):  
Preliminary Report ◽  
River Valley ◽  
Cache La Poudre River ◽  
Sand And Gravel

Control of artesian pressure by bleeder wells

1979 ◽  
Vol 16 (3) ◽  
pp. 488-496 ◽  
Author(s):  
N. H. Wade ◽  
H. Taylor
Keyword(s):  
British Columbia ◽  
River Valley ◽  
Seasonal Peak ◽  
Clayey Silt ◽  
Artesian Aquifer ◽  
Sand And Gravel ◽  
Site Test ◽  
Gravel Aquifer

Deep test bleeder wells were installed in an artesian aquifer underlying the Bridge River No. 1 hydroelectric generating station in southern British Columbia to determine whether seasonal peak artesian pressures could be controlled.The Bridge River complex, built in the early 1950's, consists of two powerhouses located about a kilometre apart on the shore of Seton Lake, a system of power tunnels, and surface penstocks, which conduct water from the Carpenter Lake reservoir in Bridge River valley to the powerhouses. The No. 1 powerhouse is founded on consolidated deposits of clayey silt, underlain by sand and gravel. Shortly after the powerhouse was constructed, ground and powerhouse movements occurred. It was later determined that such movement was caused by high artesian pressures in the sand and gravel aquifer under the powerhouse.Attempts to install bleeder wells in 1952 were unsuccessful and an offshore fill was constructed as a toe weight, which functioned adequately until 1974 when additional ground cracking was observed. After further study and additional drilling at the site, test bleeder wells and piezometers were installed in 1976.Tests conducted to assess the effect of the bleeder wells indicated that control of excessive artesian pressures by a system of bleeder wells was feasible.

scholarly journals Integrated geological and geophysical study of the Tagil river valley morphology in its middle course

2021 ◽  
Vol 6 ◽  
pp. 24-31
Author(s):  
Aleksei V. Kuzin ◽  
Keyword(s):  
Physical Properties ◽  
River Valley ◽  
Valley Floor ◽  
Eastern Slope ◽  
The Urals ◽  
Fluvial Terrace ◽  
Fluvial Terraces ◽  
Geophysical Study ◽  
Sand And Gravel ◽  
Gravel Deposit

Relevance. Integrated geological and geophysical studies of a bridge in the Makhnevo village area are considered in the frame of the Urals eastern slope geology. Research objective is to study the lithology of the underlying part of the valley floor, determine soil physical and mechanical characteristics, and study a complex of fluvial terraces. Results. Relief elevations across the river valley have been studied, and four main fluvial terrace levels typical of the Urals eastern slope have been identified. An unstable section of the streambed with a canyonshaped valley above the neotectonic unwarping zone has been identified. The geological section of the river’s floodplain and streambed were studied based on geological and geophysical data. A change in the physical properties of glauconite sandstones and clays of Paleogene age in the recent underlying part of the river valley has been established. Layers of sand and glauconite sandstone that can be developed have been found at the new bridge site near the existing sand and gravel deposit. Conclusions. A complex of terraces of the Tagil river valley in its middle course is typical for the Urals eastern slope. The paleovalley is cut into a Paleogene glauconite sandstone layer. In the underlying part of the valley floor, changes in sandstones and clays physical properties have been recorded, and the presence of hypogene minerals was revealed. These are the signs of possible neotectonic processes in the series of the Cenozoic and Quaternary deposits.

scholarly journals Topographic Map Analysis of the North Platte River-South Platte River Drainage Divide Area, Western Larimer County, Colorado, USA Eric Clausen

2021 ◽  
Vol 10 (1) ◽  
pp. 49
Author(s):  
Eric Clausen
Keyword(s):  
Colorado River ◽  
The United States ◽  
River Valley ◽  
Topographic Map ◽  
Platte River ◽  
River Drainage ◽  
South Platte River ◽  
The North ◽  
Cache La Poudre River ◽  
South Platte

The United States Supreme Court settled legal disputes concerning four different Larimer County (Colorado) locations where water is moved by gravity across the high elevation North Platte-South Platte River drainage divide, which begins as a triple drainage divide with the Colorado River at Thunder Mountain (on the east-west continental divide and near Colorado River headwaters) and proceeds in roughly a north and northeast direction across deep mountain passes and other low points (divide crossings) first as the Michigan River (in the North Platte watershed)-Cache la Poudre River (in the South Platte watershed) drainage divide and then as the Laramie River (in the North Platte watershed)-Cache la Poudre River drainage divide. The mountain passes and nearby valley and drainage route orientations and other unusual erosional features can be explained if enormous and prolonged volumes of south-oriented water moved along today’s north-oriented North Platte and Laramie River alignments into what must have been a rising mountain region to reach south-oriented Colorado River headwaters. Mountain uplift in time forced a flow reversal in the Laramie River valley while flow continued in a south direction along the North Platte River alignment only to be forced to flow around the Medicine Bow Mountains south end and then to flow northward in the Laramie River valley and later to be captured by headward erosion of the east-oriented Cache la Poudre River-Joe Wright Creek valley (aided by a steeper gradient and less resistant bedrock). Continued uplift next reversed flow on the North Platte River alignment to create drainage routes seen today. While explaining Larimer County North Platte-South Platte drainage divide area topographic map drainage system and erosional landform evidence this interpretation requires a completely different Cenozoic history than the geologic history geologists usually describe.

Excavations at Hacılar, First Preliminary Report

1958 ◽  
Vol 8 ◽  
pp. 127-156 ◽  
Author(s):  
James Mellaart
Keyword(s):  
Bronze Age ◽  
Preliminary Report ◽  
River Valley ◽  
Early Bronze Age ◽  
The South ◽  
Entire Surface ◽  
Main Road ◽  
South West ◽  
Antique Dealer ◽  
The Village

The village of Hacilar is situated in the Vilayet of Burdur in South-west Anatolia, about 25 km. west of Burdur itself on the main road to Yeşilova and Denizli. The chalcolithic site lies about 1·5 km. west of the village and just beyond the orchards, which are irrigated by a plentiful spring at the foot of a great limestone crag which overlooks the village. It is this spring which since neolithic times has been the main reason for more or less continuous occupation in this region. Apart from the neolithic and early chalcolithic site at Hacılar there is a large Early Bronze Age mound on the northern outskirts and a classical site to the south-west of the village.The prehistoric site is an inconspicuous mound, about 150 metres in diameter, rising to a height of not more than 1·50 m. above the level of the surrounding fields (Fig. 1 and Pl. XXIXa). The entire surface of the mound is under cultivation and a series of depressions show the holes made by a local antique-dealer in search of painted pots and small objects. About 1 km. west of the site runs the Koca Çay, the ancient Lysis, and on the eastern scarp of this river valley lies the cemetery of the Early Bronze Age settlement. Not a single burial has yet been found in the chalcolithic or neolithic levels of our site and it is therefore not unreasonable to suggest that its cemetery also may eventually be located there.

Excavations at Can Hasan: First Preliminary Report, 1961

1962 ◽  
Vol 12 ◽  
pp. 27-40 ◽  
Author(s):  
D. H. French
Keyword(s):  
Sea Level ◽  
Preliminary Report ◽  
River Valley ◽  
Unique Position ◽  
North East ◽  
The Village ◽  
The Town

The village of Can Hasan is situated in the Kaza of Karaman, in the Vilayet of Konya, about 13 km. north-east of the town of Karaman. Can Hasan is a small village of about three hundred people, lying in a wide and fertile plain, not too far from the first low foothills of the Taurus. The approximate height of the village above sea level is 1,000 m.Geographically the importance of Karaman and its surrounding villages lies in its unique position at the end of the route (Fig. 1) through the Taurus which begins at Silifke and follows the Gök Su (Calycadnus) as far as Mut, from where there is little difficulty in crossing the watershed between the river valley and the Karaman plain. This is one of the great routes through the Taurus and one of the easiest: there are others. All of them are used even to-day, when nomads with pack animals travel up to 300 km. through the Taurus from summer to winter pastures.

scholarly journals Preferential Rating of Duck Food Plants

2019 ◽  
Vol 22 (1-7) ◽  
pp. 417-433 ◽  
Author(s):  
Frank C. Bellrose ◽  
Harry G. Anderson
Keyword(s):  
Preliminary Report ◽  
Food Resources ◽  
River Valley ◽  
Water Levels ◽  
Illinois River ◽  
Food Plants ◽  
Moist Soil ◽  
Intensive Study ◽  
Illinois River Valley

An intensive study of the occurrence and use of duck food plants in the Illinois River valley was conducted 1938-1940. A preliminary report covering the results of the 1938 investigation was issued (Bellrose and Anderson, 1940). Altered water levels in 1939 and 1940 greatly changed the food resources of many bottomland lakes through the development of extensive communities of moist-soil plants.  This paper summarizes the data for 1938-1940. 

scholarly journals Hydrochemical Characteristics and Formation of the Madeng Hot Spring in Yunnan, China

Geofluids ◽  
2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Ren Zhenhua ◽  
Zhou Xun ◽  
Yang Miaolin ◽  
Wang Xiaocui ◽  
Zheng Yuhui ◽  
...  
Keyword(s):  
Yunnan Province ◽  
Cold Water ◽  
Ph Value ◽  
Hot Spring ◽  
Spring Water ◽  
River Valley ◽  
Hot Water ◽  
Mixture Ratio ◽  
Deep Circulation ◽  
Sand And Gravel

The Madeng hot spring emerges in the central river valley in the northeastern Lanping Basin in Jianchuan county of Yunnan Province in China. Quaternary sand and gravel occur in the valley which is underlain by the red beds consisting of sandstone and mudstone. The temperature of the hot spring is 42.1°C. The spring water has a pH value of 6.41, TDS of 3.98 g/L, F contents of 3.08 mg/L, and H2SiO3 of 35.6 mg/L. The hot water is of SO4•Cl-Na•Ca type. There is a slight hydrogen sulfide odor in the spring water. Stable hydrogen and oxygen isotopes indicate that the hot water is of meteoric origin. It is estimated that the elevation of the recharge area of the hot spring is approximately 3800 m, the age of the hot water is some 140 years, the temperature of the geothermal reservoir is 75°C–80°C, the mixture ratio of cold water is approximately 80%, and the circulation depth of the thermal groundwater is 1870 m. After receiving recharge from infiltration of precipitation in the mountainous recharge areas, the groundwater undergoes a deep circulation, obtains heat from the heat flow, flows upward along the fractured zone, and emerges as an upflow spring through the Quaternary sand and gravel in the central low-lying river valley.

scholarly journals GEOMORPHIC CONSTRAINS ON THE EVOLUTION OF THE AGGITIS RIVER BASIN NORTHERN GREECE (A PRELIMINARY REPORT)

2017 ◽  
Vol 50 (1) ◽  
pp. 365 ◽  
Author(s):  
Ch. Pennos ◽  
S.E. Lauritzen ◽  
S. Pechlivanidou ◽  
Y. Sotiriadis
Keyword(s):  
River Basin ◽  
Preliminary Report ◽  
Morphological Characteristics ◽  
River Valley ◽  
Morphological Features ◽  
Northern Greece ◽  
Geomorphological Mapping ◽  
Sediment Deposits ◽  
Surface Geomorphology ◽  
Geomorphological Features

In this paper we discuss the landscape evolution of the Aggitis River basin by correlating the morphological characteristics of the Maaras Cave (Aggitis River spring) with the main geomorphological features of the Aggitis fluvial valley. We combine the various morphological features that are hidden inside the Maaras Cave with the surface geomorphology of the river valley in order to trace the imprint of the different evolutionary stages on the landscape. Also, we provide a relative chronological framework for the evolution of the area. The 3D survey of the Maaras Cave shows that the roof of the cave is looping-like shaped in contrast to the floor of the cave that shows low slopes and holds thick clastic sediment deposits. Furthermore, the geomorphological mapping of the Aggitis River valley shows two prominent windgaps at the southern part of the basin that formed as the result of river capture. Our results suggest that the Aggitis River basin suffered four major evolutionary stages from the Neogene until the Quaternary.

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