Variations in Quality and Quantity of Slims River Water, Yukon Territory

1972 ◽  
Vol 9 (11) ◽  
pp. 1469-1478 ◽  
Author(s):  
M. Leonard Bryan
Keyword(s):  
Water Quality ◽  
River Water ◽  
Yukon Territory ◽  
Water Quantity ◽  
Glacier Terminus ◽  
Melt Water ◽  
Ablation Pattern ◽  
Water Quality And Quantity ◽  
Kluane Lake

The Slims River, one of the two outlets draining the Kaskawulsh Glacier of the Icefield Ranges, Yukon Territory, Canada, is seen to have a variation in both quality and quantity of discharge. These variations, studied for several 24 hour periods during the summer of 1970, are reflections of both the diurnal ablation pattern of the Kaskawulsh Glacier and of a shift in the glacial drainage, a shift which is thought to be due to ice movements at the glacial terminus. Water quality and quantity was measured at the bridge where the Alaska Highway crosses the Slims River and its delta in Kluane Lake. In addition, several similar measurements were taken on tributary streams entering the Slims River below the glacier terminus. Both sets of measurements show a distinct change during early August, the water quantity decreased by a factor of 3–5 and the quality became decidedly less fresh. The change in quality is considered to be a result of the decrease in the proportion of glacial melt water in the Slims River. The effects these changes in river water may have on sediment regimes in Kluane Lake are briefly discussed.

Study on the Water Quality and Quantity Scheduling Scheme in Xinxue River Constructed Wetland of China under the Constraint Condition of Class III of Surface Water Quality

2011 ◽  
Vol 374-377 ◽  
pp. 923-927
Author(s):  
Chao Liu ◽  
Xiao Jie Cao ◽  
Chao Wang ◽  
Jing Jing Sun ◽  
Yu Ting Gu
Keyword(s):  
Water Quality ◽  
Surface Water ◽  
Constructed Wetland ◽  
Surface Water Quality ◽  
Ammonia Nitrogen ◽  
Water Quantity ◽  
Constraint Condition ◽  
Scheduling Scheme ◽  
Influent Water ◽  
Water Quality And Quantity

Using Xinxue River Constructed Wetland as the study object, the wetland prediction models based on BP neural network were established through the seasonal division of the wetland, and the maximum influent water load was determined on the constraint condition that effluent water quality achieved class Ⅲ of surface water quality. Then nonlinear functions of water quality and quantity scheduling were constructed by Origin software. The optimal influent load was determined adopting prediction results of the models as constraint conditions of the functions. Thus the water quality and quantity scheduling scheme of the wetland was established. The results show that optimal influent load for Feb. ~ May: the influent water quantity is no more than 8560m3/d, CODCr is 25.47mg/l~26.37mg/l, ammonia nitrogen 0.11mg/l~1.0mg/l, TN 10.28mg/l~10.51mg/l, TP 0.16mg/l; for Jun. ~ Sept.: the water quantity is no more than 31750m3/d, CODCr is 26mg/l~32.36mg/l, or 37.15mg/l~45.37mg/l, ammonia nitrogen 0.48 mg/l~1.78mg/l, TN 5.15mg/l~6.18mg/l, TP 0.07mg/l~0.09mg/l; for Oct. ~ Dec.: the water quantity is no more than 11070m3/d, CODCr is 24.55mg/l~26.91mg/l, ammonia nitrogen no more than 0.75, TN no more than 8.61 mg/l, TP 0.10mg/l~0.12mg/l, or 0.16mg/l~0.17mg/l.

scholarly journals Using a three-tier model to optimize the allocation of river water resources to meet eco-environmental water requirement targets

2017 ◽  
Vol 18 (4) ◽  
pp. 1222-1233
Author(s):  
Ze-ning Wu ◽  
Qian-qian Cao ◽  
Cui-mei Lv ◽  
Hui-liang Wang ◽  
Zi-hao Jiang
Keyword(s):  
Water Quality ◽  
Water Resources ◽  
River Water ◽  
Oxygen Demand ◽  
Environmental Water ◽  
Ammonia Nitrogen ◽  
Clean Water ◽  
Water Requirements ◽  
Current State ◽  
Water Quality And Quantity

Abstract It is difficult to simultaneously manage the dynamic demands for river water quality and quantity, and reconcile the contradiction between socio-economic and eco-environmental water consumption. As a solution, we proposed a three-tier model to optimize the distribution of river water resources. Using three constraint conditions, namely the ratio of wastewater to clean water, the eco-environmental water requirements of each node and the use of wetland projects, we determined various water quantity and quality allocation scenarios. We tested the model on the Qingyi River, and found that, for the recommended scenario that involved enhanced water-saving, a wastewater/clean water ratio and wetlands, more than 80% of the eco-environmental water requirements of each node except for the Luma section were achieved for each month. While the water quality in some individual river sections did not meet the standards for a few months of the year, the water quality of the remaining sections could be improved from class V, the current state, to class IV, and ammonia nitrogen and chemical oxygen demand (COD) standards could be achieved 82% and 96% of the time, respectively. These results show that the proposed model is effective and fit for purpose.

scholarly journals How Water Quality and Quantity Affect Pepper Yield and Postharvest Quality

Horticulturae ◽  
2019 ◽  
Vol 5 (1) ◽  
pp. 4 ◽  
Author(s):  
Elazar Fallik ◽  
Sharon Alkalai-Tuvia ◽  
Daniel Chalupowicz ◽  
Merav Zaaroor-Presman ◽  
Rivka Offenbach ◽  
...  
Keyword(s):  
Water Quality ◽  
Weight Loss ◽  
Irrigation Water ◽  
Total Yield ◽  
Postharvest Quality ◽  
Water Quantity ◽  
Salty Water ◽  
Quality Water ◽  
Export Quality ◽  
Water Quality And Quantity

There are gaps in our knowledge of the effects of irrigation water quality and amount on yield and postharvest quality of pepper fruit (Capsicum annuum L.). We studied the effects of water quality and quantity treatments on pepper fruits during subsequent simulated storage and shelf-life. Total yield decreased with increasing water salinity, but export-quality yield was not significantly different in fruits irrigated with water of either 1.6 or 2.8 dS/m, but there was a 30–35% reduction in export-quality yield following use of water at 4.5 dS/m. Water quantity hardly affected either total or export-quality yield. Water quality but not quantity significantly affected fruit weight loss after 14 days at 7 °C plus three days at 20 °C; irrigation with water at 2.8 dS/m gave the least weight loss. Fruits were significantly firmer after irrigation with good-quality water than with salty water. The saltier the water, the higher was the sugar content. Vitamin C content was not affected by water quality or quantity, but water quality significantly affected antioxidant (AOX) content. The highest AOX activity was found with commercial quality water, the lowest with salty water. Pepper yield benefited by irrigation with fresh water (1.6 dS/m) and was not affected by water quantity, but post-storage fruit quality was maintained better after use of moderately-saline water (2.8 dS/m). Thus, irrigation water with salinity not exceeding 2.8 dS/m will not impair postharvest quality, although the yield will be reduced at this salinity level.

scholarly journals Advances in Drainage: Selected Works from the Tenth International Drainage Symposium

2018 ◽  
Vol 61 (1) ◽  
pp. 161-168 ◽  
Author(s):  
Jeffrey S. Strock ◽  
Christopher Hay ◽  
Matthew J. Helmers ◽  
Kelly A. Nelson ◽  
Gary R. Sands ◽  
...  
Keyword(s):  
Water Quality ◽  
Agricultural Production ◽  
Crop Production ◽  
Water Quantity ◽  
Agricultural Drainage ◽  
Crop Response ◽  
Scale Modeling ◽  
Production Water ◽  
Wide Range ◽  
Water Quality And Quantity

Abstract. This article introduces a special collection of fourteen articles accepted from among the 140 technical presentations, posters, and meeting papers presented at the 10th International ASABE Drainage Symposium. The symposium continued in the tradition of previous symposia that began in 1965 as a forum for presenting and assessing the progress of drainage research and implementation throughout the world. The articles in this collection address a wide range of topics grouped into five broad categories: (1) crop response, (2) design and management, (3) hydrology and scale, (4) modeling, and (5) water quality. The collection provides valuable information for scientists, engineers, planners, and others working on crop production, water quality, and water quantity issues affected by agricultural drainage. The collection also provides perspectives on the challenges of increasing agricultural production in a changing climate, with ever-greater attention to water quality and quantity concerns that will require integrated technical, economic, and social solutions. Keywords: ASABE Drainage Symposium, crop response, design and management, hydrology and scale, modeling, water quality.

Communicating with Extension Clients about Water

EDIS ◽  
2017 ◽  
Vol 2017 (6) ◽  
Author(s):  
Alexa J. Lamm ◽  
Phillip S. Stokes ◽  
Caroline G. Roper
Keyword(s):  
Water Quality ◽  
Public Opinion ◽  
The United States ◽  
Water Quantity ◽  
Surrounding Water ◽  
Specialty Crop ◽  
Important Extension ◽  
Water Quality And Quantity ◽  
Water Issues ◽  
Water Quantity And Quality

The conservation and preservation of natural resources is one of the most pressing issues facing the nation today (Gregory & Di Leo, 2003). Among these natural resource issues are the issues of water quality and quantity. Water is one of the most important resources in the United States, and is especially important in Florida. Not only is Florida a specialty crop state, but the Florida economy also depends highly on tourism and recreation, both of which thrive on water. Water impacts Florida’s tourism, agriculture, retail, and real estate development industries, all of which significantly contribute to Florida’s economy (Odera, Lamm, Dukes, Irani, & Carter, 2013). As the U.S. and Florida populations continue to increase and the demand for fresh, clean water rises, water quality and quantity issues will become increasingly important. Extension faculty should understand public opinion surrounding water issues and identify the information that needs to be communicated to the public about water issues, as well as the best mode for this communication. By understanding public opinion and topics of interest surrounding water quantity and quality, as well as Florida residents’ preferred communication methods, Extension faculty will be able to communicate more effectively with clients about water. The issues associated with water quantity and quality are of ever-increasing importance, and are considered a priority by UF/IFAS Extension. Enhancing and protecting water quality, quantity, and supply is considered a high-priority initiative in the 2013–2023 Florida Extension Roadmap. This EDIS publication will provide an overview of how to communicate with Florida residents about water, including information about their preferred communication method and what topics surrounding water Florida residents find of interest. This publication will better equip Extension faculty to discuss water quantity and quality issues with Florida residents.

scholarly journals A regionalized river water quality model calibration method based on watershed physical characteristics: application to the Cau River in Vietnam

2018 ◽  
Vol 31 (3) ◽  
pp. 251-269
Author(s):  
Lise Audet ◽  
Sophie Duchesne ◽  
Nomessi Kokutse
Keyword(s):  
Water Quality ◽  
River Water ◽  
Hydrological Model ◽  
Calibration Method ◽  
Water Quality Model ◽  
River Water Quality ◽  
Quality Model ◽  
River Stretch ◽  
Definition Of ◽  
Water Quality And Quantity

A methodology is proposed for the calibration of river water quality models on large watersheds, in the absence of intensive measurements for water quality and quantity. This methodology is based on: 1) the use of the results from a hydrological model to provide the required hydrological variables to the water quality model; 2) five assumptions for the definition of initial and boundary conditions; 3) a three-step regionalized calibration method, in which the specific characteristics of the different subwatersheds are taken into account and 4) the adjustment of some parameters in order to reproduce processes that are not explicitly represented in the model. The regionalized calibration method relies on a comprehensive study of the land use and characteristics on each subwatershed and the definition of different sets of parameters values in distinct regions. Application to the Cau River, in Vietnam, with QUAL-GIBSI, an adaptation of the QUAL2E model, showed that: i) calibration and validation results were significantly improved by applying regionalized calibration as compared to an initial calibration for which a single set of parameters values was used for the whole simulated river stretch and ii) use of a hydrological model to provide discharge at various points in the watershed allowed to overcome the lack of detailed measurements of discharge at locations other than the watershed outlet.

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