scholarly journals A role of river water on groundwater recharge in the Kurobe Alluvial Fan

2006 ◽  
Vol 36 (1) ◽  
pp. 23-36
Author(s):  
Hibiki MARUYAMA
Keyword(s):  
Groundwater Recharge ◽  
River Water ◽  
Alluvial Fan

Multiple‐indicator study of the response of groundwater recharge sources to highly turbid river water after a landslide in the Tedori River alluvial fan, Japan

2020 ◽  
Vol 34 (16) ◽  
pp. 3539-3554
Author(s):  
Yumi Yoshioka ◽  
Kimihito Nakamura ◽  
Hiroshi Takimoto ◽  
Shinji Sakurai ◽  
Takao Nakagiri ◽  
...  
Keyword(s):  
Groundwater Recharge ◽  
River Water ◽  
Alluvial Fan ◽  
Recharge Sources ◽  
Multiple Indicator

Influence of a dual monsoon system and two sources of groundwater recharge on Kofu basin alluvial fans, Japan

2016 ◽  
Vol 48 (4) ◽  
pp. 1071-1087 ◽  
Author(s):  
Takashi Nakamura ◽  
Kei Nishida ◽  
Futaba Kazama
Keyword(s):  
Mass Balance ◽  
Groundwater Recharge ◽  
River Water ◽  
Isotopic Analysis ◽  
Alluvial Fan ◽  
Alluvial Fans ◽  
Recharge Sources ◽  
Balance Analysis ◽  
Monsoon System ◽  
Mass Balance Analysis

This study investigates the contribution ratios of different groundwater recharge sources and influence of a dual monsoon system in Kofu basin, central Japan, through the hydrogen and oxygen isotopic analysis of precipitation, river water, and groundwater. The study is focused on the area of the Kamanashigawa and Midaigawa alluvial fans, which are formed by two main rivers. Precipitation isotopic content exhibits significant seasonal variability. Also, river water presents d-excess values higher than annual precipitation at plain areas (9 and 10‰), suggesting that two different air-masses contribute to precipitation, corresponding to the monsoon and pre-monsoon periods. The results of this study allow estimation of relative contributions of different sources to groundwater and influence of a dual monsoon system. The mass-balance analysis of the δ18O to identify the groundwater source indicates the river water contributes 38–100% of the recharge, while precipitation contributes 29–62% in Kamanashigawa alluvial fan. In the case of Midaigawa alluvial fan, river water contributes 77–99% in the northern part; in the southern side, 30–93% of contribution comes from precipitation. The mass-balance analysis of the d-excess indicates pre-monsoon precipitation contributes 46–68% and 39–65% to groundwater of the Kamanashigawa and Midaigawa alluvial fans, respectively.

Silicon Substitution for Calcium in the Shell of the Fingernail Clam, Musculium Transversum Studied By X-Ray Analysis

1980 ◽  
Vol 38 ◽  
pp. 560-561
Author(s):  
Judith A. Murphy ◽  
Anthony Paparo ◽  
Richard Sparks
Keyword(s):  
Carbonic Anhydrase ◽  
River Water ◽  
Food Chains ◽  
Well Water ◽  
Shell Formation ◽  
X Ray ◽  
Molluscan Shell ◽  
Fingernail Clams

Fingernail clams (Muscu1ium transversum) are dominant bottom-dwelling animals in some waters of the midwest U.S. These organisms are key links in food chains leading from nutrients in water and mud to fish and ducks which are utilized by man. In the mid-1950’s, fingernail clams disappeared from a 100-mile section of the Illinois R., a tributary of the Mississippi R. Some factor(s) in the river and/or sediment currently prevent clams from recolonizing areas where they were formerly abundant. Recently, clams developed shell deformities and died without reproducing. The greatest mortality and highest incidence of shell deformities appeared in test chambers containing the highest proportion of river water to well water. The molluscan shell consists of CaCO3, and the tissue concerned in its secretion is the mantle. The source of the carbonate is probably from metabolic CO2 and the maintenance of ionized Ca concentration in the mantle is controlled by carbonic anhydrase. The Ca is stored in extracellular concentric spherical granules(0.6-5.5μm) which represent a large amount of inertCa in the mantle. The purpose of this investigation was to examine the role of raw river water and well water on shell formation in the fingernail clam.

THE ROLE OF EPHEMERAL PONDS IN GROUNDWATER RECHARGE IN THE CANADIAN PRAIRIES

2020 ◽  
Author(s):  
Andrew Ireson ◽  
◽  
Garth van der Kamp ◽  
Edward Bam
Keyword(s):  
Groundwater Recharge ◽  
Canadian Prairies ◽  
Ephemeral Ponds

The role of institutional and legal constraints on river water quality monitoring in Ukraine

2014 ◽  
Vol 72 (12) ◽  
pp. 4745-4756 ◽  
Author(s):  
Nina Hagemann ◽  
Bernd Klauer ◽  
Ruby M. Moynihan ◽  
Marco Leidel ◽  
Nicole Scheifhacken
Keyword(s):  
Water Quality ◽  
River Water ◽  
Water Quality Monitoring ◽  
River Water Quality ◽  
Quality Monitoring ◽  
Legal Constraints

Water Security and Armed Conflict

2020 ◽  
pp. 125-144
Author(s):  
Rhett B. Larson
Keyword(s):  
Water Stress ◽  
International Law ◽  
River Water ◽  
Armed Conflict ◽  
Water Security ◽  
Food Prices ◽  
History Of ◽  
Ancient Civilizations ◽  
Human Conflict

Water has not just been the locus of human cooperation, as seen in our early ancient civilizations arising along the banks of desert rivers. It has also been the geography of our conflicts. Indeed, the role of water in human conflict can be seen even in our languages. For example, the word “rival” comes from the Latin word rivalis, meaning those who share a river. Water has been a strategic target and even a weapon in war. In very rare instances, disputes over water have escalated into violence. Water stress results in instability, rising food prices, and desperation, which are often dry kindling for radicalization. This chapter discusses the history of water and violence, why water is more often a source of cooperation than conflict, and the role international law has, and may, play in continuing the pattern of water as a catalyst for peace.

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