Indices of Productivity in British Columbia Lakes

1956 ◽  
Vol 13 (4) ◽  
pp. 515-540 ◽  
Author(s):  
T. G. Northcote ◽  
P. A. Larkin
Keyword(s):  
British Columbia ◽  
Total Dissolved Solids ◽  
Solid Content ◽  
General Level ◽  
Bottom Fauna ◽  
Significant Relation ◽  
Dissolved Solids ◽  
Hyperbolic Curve ◽  
Total Dissolved Solid ◽  
Physical And Chemical

The relation between physical and chemical indices of production and standard crops of plankton, bottom fauna and fish was examined in 100 British Columbia lakes. A significant increase in plankton and fish quantities with increase in total dissolved solid content of lake waters was demonstrated and a similar relationship suggested for bottom fauna. Although the general form of the relationship between mean depth and plankton, and between bottom fauna and fish quantity, suggested a hyperbolic curve with larger quantities in lakes of low mean depth, the only generalization which seemed justified was that quantities of fauna from lakes of great mean depth were never as high as those found in some lakes of low mean depth. No significant relation was found between intensity and length of growing season and quantities of plankton, bottom fauna or fish, although a significant relationship was demonstrated between summer epilimnion temperature and plankton.In a multiple regression analysis using all lakes the predominance of total dissolved solids over mean depth in affecting summed indices of lake fauna was shown. However for lakes in the southern interior plateau, one of the 9 regions distinguished in British Columbia, no significant relation could be demonstrated between mean depth or total dissolved solids and summed indices of fauna or plankton alone. Thus total dissolved solid content of the water appeared to be the most important factor in determining the general level of productivity in lakes studied throughout the province, although within a region neither total dissolved solids nor mean depth could be used either singly or together to predict plankton, bottom fauna or fish quantities.

Limnological Features of Cedar Lake, Manitoba

1965 ◽  
Vol 22 (5) ◽  
pp. 1123-1136
Author(s):  
D. W. Webb
Keyword(s):  
Thermal Stratification ◽  
River System ◽  
Dry Weight ◽  
Total Dissolved Solids ◽  
Mean Value ◽  
Total Alkalinity ◽  
Bottom Fauna ◽  
Chemical Factors ◽  
Main Basin ◽  
Physical And Chemical

Cedar Lake, largest lake in the Saskatchewan River system, was studied from June 14 until August 31, 1962. Twenty stations, located in the main basin of the lake, were examined during six sampling periods. These stations were located along five transects, at depths of 1.5, 3, 6, and 9 m. No thermal stratification occurred and the oxygen concentration never fell below 78% of air saturation. Total alkalinity and total dissolved solids averaged above 65 and 270 ppm, respectively.The average number of bottom organisms increased with depth, with the bulk of these being made up of spheariid clams, mayflies, chironomids, and gastropods. The number of genera also increased with depth. The standing crops determined for the six sampling periods ranged from 17.7 to 33.2 lb/acre (dry weight), with a mean value of 23.4 lb/acre. Correlations between the physical and chemical factors and the distribution of bottom fauna are examined and it is felt that the bottom type is the major factor affecting the distribution and abundance of bottom organisms in Cedar Lake. On the basis of the physical and chemical criteria, Cedar Lake may be classified as eutrophic.

scholarly journals ALAT UKUR TDS (TOTAL DISSOLVED SOLID) AIR GARAM DENGAN RESISTIF SEBAGAI INDIKATOR

2016 ◽  
Vol 19 (1) ◽  
pp. 9
Author(s):  
Aloisius Wisnu Lalita Dewa ◽  
Priyo Sasmoko
Keyword(s):  
Water Quality ◽  
Salt Water ◽  
Digital Signal ◽  
Alternating Current ◽  
Total Dissolved Solids ◽  
Analog Signal ◽  
Dissolved Solids ◽  
Factory Production ◽  
Total Dissolved Solid ◽  
Reading Distance

Aloisius Wisnu Lalita Dewa, Priyo Sasmoko  in this paper explain that, physical water quality can be identified in various ways, one of which is measuring the amount of solute called Total Dissolved Solid (TDS). This study aims to design and make a TDS solution by using two electrodes as sensors. These two electrodes flow alternating current and negative values alternately into water. Analog signal in the form of voltage is read by the microcontroller by converting it into a digital signal, then the microcontroller processes the data and displays the TDS value. Tests are carried out by measuring the same solution using TDS meters and salt water TDS. Testing starts from a solution of 175 ppm to 8500 ppm. Making solutions based on TDS meter factory production. The results of salt water TDS measurements showed that the measured tds values increased from 173 ppm to 8007 ppm. Error reading at 8500 ppm, this is because the reading distance of salt water TDS is only up to 8260 ppm. Keywords : TDS, conductivity, electroda, measurement device.ReferencesMalvino. 1995. Prinsip-prinsip Elektronkai. Jakarta : Erlangga.Rusmadi, Dedy. 2001. Mengenal Komponen Elektronika. Bandung : Pionir JayaSumariyah, Yulianto. T, Priyono J, 2006. Rancang Bangun Sistem Pengukur Konduktivitas Larutan Elektrolit Menggunakan Mikrokontoler AT89C51. Program Studi Fisika Fakultas MIPA Universitas Diponegoro. Semarang.Utomo, D. 2012. Alat pengukur resistansi konduktivitas. dan Total dissolved solids air dengan Teknik dorong-tarik. Program Studi Sistem Komputer. Fakultas Teknik Elektronika dan Komputer. Universitas Kristen Satya Wacana. Salatiga.Wiono.A,Rahmawati. E, 2014.  Perancangan Dan Pembuatan Alat Ukur Konduktivitas Larutan Berbasis Mikrokontroler. Program Studi Fisika Fakultas MIPA Universitas Negeri Surabaya. Surabaya

Seasonal Changes in the Limnology of Some Meromictic Lakes in Southern British Columbia

1969 ◽  
Vol 26 (7) ◽  
pp. 1763-1787 ◽  
Author(s):  
T. G. Northcote ◽  
T. G. Halsey
Keyword(s):  
Seasonal Changes ◽  
Specific Conductivity ◽  
Solid Content ◽  
Lake Basin ◽  
Physical Chemical ◽  
Morphometric Features ◽  
Wide Range ◽  
Sulphur Bacteria ◽  
Total Dissolved Solid ◽  
Physical And Chemical

Seasonal changes in physical, chemical, and biological features are described in four small lakes which show different types and degrees of meromixis. There is a wide range in total dissolved solid content between lakes as well as within lakes (surface to near-bottom): Yellow, 282 (surface) to 337 (bottom); White, 6229–7918; Mahoney, 10,003–86,906; Lyons, 12,116–222,195 mg/liter, but no marked seasonal changes. In Yellow Lake meromixis is probably maintained by morphometric features of the lake basin rather than a strong chemocline; in the other lakes complete mixing is inhibited by chemical density gradients, those in Mahoney and Lyons being especially sharp.Summer, autumn, winter (under ice), and spring vertical profiles are presented for temperature, dissolved oxygen, pH, alkalinity, specific conductivity; differences within and between lakes are discussed. Other physical–chemical characteristics are given in less detail.Purple sulphur bacteria occur in three of the lakes (White, Mahoney, Lyons) and in the latter two form discrete "plates" detectable by high frequency echo sounding (confirmed by sampling). Seasonal changes in depth of the bacterial plates are considered in relation to some physical and chemical parameters. Phytoplankton, zooplankton, and benthos communities are discussed in relation to the degree of meromixis shown by the lakes.

scholarly journals Comparative Limnology of Lakes in the Southern Rocky Mountain Trench, British Columbia

1966 ◽  
Vol 23 (12) ◽  
pp. 1875-1895 ◽  
Author(s):  
R. A. H. Sparrow
Keyword(s):  
British Columbia ◽  
Geographical Area ◽  
Rocky Mountain ◽  
Detailed Examination ◽  
Bottom Fauna ◽  
Lake Basin ◽  
Wide Range ◽  
Total Dissolved Solid ◽  
Climatic Characteristics ◽  
Restricted Geographical Area

Within a restricted geographical area of British Columbia, detailed examination in 1960 and 1961 of nine lakes having similar morphometric and climatic characteristics but exhibiting a wide range in dissolved nutrients (50 to 1463 ppm) suggested that, standing crops of plankton were related to oxygen deficits and perimeter-to-area ratios of the lakes. Total dissolved solid contents of the lakes were not closely correlated to standing crops of plankton, bottom fauna, or fish. Ranking by selected physical or chemical indices of productivity failed to agree with ranking based on standing crops or various biological measurements of productivity. Water level fluctuation, perimeter-to-area ratios, lake basin shape, and the size and nature of the drainage area are discussed as some of the possible factors which interact to modify the expression of the primary factors in productivity.

scholarly journals The shelf life of kawista fruit salad (rujak) dressing using Accelerated Shelf-Life Testing (ASLT) method

2022 ◽  
Vol 951 (1) ◽  
pp. 012087
Author(s):  
M Hayati ◽  
N Arpi ◽  
Z F Rozali
Keyword(s):  
Moisture Content ◽  
Shelf Life ◽  
Analytical Methods ◽  
Storage Time ◽  
Total Dissolved Solids ◽  
Life Testing ◽  
Dissolved Solids ◽  
Palm Sugar ◽  
Total Dissolved Solid

Abstract Rujak kawista sauce is one of the typical Indonesian foods made from palm sugar, tamarind, bird’s eye chili, nuts, and special fruits of kawista to enhance the flavour. There is no information about the shelf-life of rujak kawista sauce to date. Therefore, it is necessary to conduct a study on the storage time of the rujak kawista sauce to determine the product’s shelf life. This study used the ASLT method to determine the shelf life of rujak sauce. The sauce was stored at temperatures of 30°C, 40°C, and 50°C within 21 days storage time and was analysed every seven days. The analytical methods used to support the ASLT method are TBA, moisture content, FFA, total dissolved solids and pH. The result showed that TBA value was 0.046-0.19 mg malonaldehyde/kg, moisture content was 16.68-20%, FFA was 0.66-0.80%, total dissolved solid was 17.9-21.1°Brix, and pH was 3.1-3.5. Based on Arrhenius calculations, the shelf-life of rujak kawista sauce was two months.

scholarly journals A study on the groundwater of Peenya industrial area and its related elements in Bengaluru region of Karnataka State, India

2018 ◽  
Vol 6 (2) ◽  
pp. 1-12 ◽  
Author(s):  
Blessy Baby Mathew ◽  
Nideghatta Beeregowda Kirshnamurthy
Keyword(s):  
Bacterial Population ◽  
Industrial Area ◽  
Total Dissolved Solids ◽  
Total Hardness ◽  
Rill Erosion ◽  
Biochemical Tests ◽  
Dissolved Solids ◽  
Water Logging ◽  
Staining Methods ◽  
Physical And Chemical

AbstractGroundwater samples were collected from the Peenya Industrial area of Bengaluru, India to test its quality, elemental composition and inherent bacterial population. Further analysis was done using GIS Based Geostatistical techniques to study the level of groundwater and to generate various maps of lineament, digital elevation, geomorphology, soil erosion, salt affected areas and water logging in this region. Physical and chemical parameters such as Total Dissolved Solids, pH, temperature, BOD, COD, metal ions present in the water samples were studied along with predominant microbial constituents. The Total Dissolved Solids and Total Hardness were far beyond the maximum concentration levels. Further analysis of the isolated bacteria was done using staining methods and biochemical tests. The results obtained showed that the area under study had wells ranging from shallow to deep heights of 30 to 80 meters, with a wide variety of 10-400 LPM; whereas the lineament map suggested that the area was bound with parallel ridges and joints. The geographical data represented pediplain complexes, anthropogenic terrains and water bodies. The area was found to go through a seasonal water logging and the soil loss was due to sheet erosion and rill erosion. It was also observed that the groundwater was contaminated with heavy metals such as lead, chromium etc. along with a diversified bacterial population.

scholarly journals SIFAT FISIK DAN KIMIA MARMALADE JERUK KALAMANSI (Citrus microcarpa) : KAJIAN KONSENTRASI PEKTIN DAN SUKROSA Physical and Chemical Properties of Marmalade Citrus of Calamondin (Citrus microcarpa) : Study of Pectin and Sucrose Concentrations

2017 ◽  
Vol 18 (02) ◽  
pp. 164-172
Author(s):  
Tuti Tutuarima
Keyword(s):  
Moisture Content ◽  
Block Design ◽  
Chemical Properties ◽  
Total Dissolved Solids ◽  
Heating Time ◽  
Physical And Chemical Properties ◽  
Dissolved Solids ◽  
Randomized Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of this study was to determine the effect of pectin and sucrose on the physical and chemical properties of marmalade citrus of calamondin and get the best treatment combination on making marmalade made from calamondin. This study used Randomized Block Design with 2 different factors. The first factor is the addition of pectin that is the level 1.75%, 2%, and 2.25%. While the second factor is the concentration of sucrose is 75%, 85%, and 95%. Each treatment was repeated 3 times to obtain 27 units of experiment. The process of making marmalade using heating time for 20 minutes at 70oC. The analyzes include viscosity, ability to spread of jam, moisture content, pH, and total dissolved solids. The analysis was conducted at Agricultural Technology Laboratory of Bengkulu University. The results showed that marmalade with the use of pectin 2.25% and 95% sucrose resulted the optimal in viscosity, ability to spread of jam, and total dissolved solids. For the results of moisture content and optimal pH obtained at the use of pectin 1.75% and 75% sucrose.

scholarly journals A study of some physical, chemical and biological properties of Slabiaat River waters in Al-Muthanna province, Iraq

2017 ◽  
Vol 14 (2) ◽  
pp. 289-298
Author(s):  
Baghdad Science Journal
Keyword(s):  
Electrical Conductivity ◽  
Dissolved Oxygen ◽  
River Water ◽  
Total Dissolved Solids ◽  
Biological Properties ◽  
Total Hardness ◽  
Dissolved Solids ◽  
River Waters ◽  
Study Results ◽  
Physical And Chemical

Present study was conducted in order to assess Slabiaat water quality by measuring some physical and chemical factors of river water, the study included a choice of three stations along of Slabiaat River in Samawa city, water samples collected a monthly during the period from September 2013 August 2014. The study involved measuring the Air & water temperatures, pH, Electrical conductivity, Total dissolved solids, Dissolved oxygen, Total hardness, calcium hardness, magnesium, turbidity, and some types of bacteria in River water. The study results showed that the values of air & water temperatures have ranged between (20.1-36.6)?C , (10-21.8) in Slabiaat River, respectively . pH values ranged between (6.6-8.7). Electrical conductivity in study sites record values ranged between (2625-9775) µs? cm. Total dissolved solids showed values are changing through months of study and between stations was highest (5500 mg/L) in S3. Dissolved oxygen values ranged between (4-7 mg/L) in Slabiaat River. Total hardness, calcium and magnesium were (690-2100), (500-1020) and (12.15-325.62) mg CaCO3/L, respectively, either turbidity values were the highest value in the river is (98) NTU, and the lowest was (12) NTU. Also,It has been identified Staphylococcus, E. coli, Vibrio, Proteus & Pseudomonas in river waters. Statistically, significant differences have emerged in all physical and chemical characteristics between months at probability (P? 0.05), while did not show between stations, except for calcium hardness.

scholarly journals Total Dissolved Solids on Turmeric Emulsion (Curcuma longa L.) Affected by Iota and Kappa Carrageenan

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Lusida Mulia Arganis ◽  
Heni Rizqiati ◽  
Anang Mohamad Legowo ◽  
Yoyok Budi Pramono ◽  
Ahmad Ni'matullah Al-Baarri
Keyword(s):  
Curcuma Longa ◽  
Total Dissolved Solids ◽  
Red Seaweed ◽  
Dissolved Solids ◽  
Total Dissolved Solid ◽  
Kappa Carrageenan

The quality of emulsion such as total dissolved solids, may be determined by type of emulsifier. Carrageenan is a polysaccharide from red seaweed (Rhodophyceae) and it is well known as emulsifier, however the application of carrageenan has not widely used in traditional beverage in Java Island, Indonesia. Therefore, the purpose of this research was to determine the effect of carrageenan in turmeric emulsion on its total dissolved solids. Distribution of total dissolved solids was tested using total dissolved solid-meter. Iota and kappa carrageenan were used. As a result, carrageenan might increase total dissolved solid at 58±3.4% and iota had reached higher total dissolved solid than kappa. As conclusion, total dissolved solid might be elevated by the addition of carrageenan.

The Trophic Status of Port John Lake, British Columbia

1954 ◽  
Vol 11 (5) ◽  
pp. 624-651 ◽  
Author(s):  
J. G. Robertson
Keyword(s):  
British Columbia ◽  
Organic Matter ◽  
Thermal Stratification ◽  
Heavy Rainfall ◽  
Trophic Status ◽  
Drainage Basin ◽  
Coniferous Forest ◽  
Total Dissolved Solids ◽  
Dissolved Solids ◽  
Summer Heat

Port John Lake is situated on King Island on the central British Columbia coast. Area is about 0.35 square miles (910,000 sq. m.). The drainage basin is 3.6 square miles (9.3 sq. km.) with an igneous foundation supporting a coniferous forest. Annual precipitation is 116 inches (295.5 cm.). An oligotrophic lake, it has a volume development of 1.53 and a mean depth of 82.2 feet (25.1 m.). The thermal stratification is second order, temperate, of the Whipple classification. The summer heat income is approximately 11,000 gram-calories per sq. cm. The ratio of O2 in the hypolimnion to O2 in the epilimnion is 6.58. Total dissolved solids are 39 ppm. at the lake surface.Large amounts of organic matter are washed into the lake imposing a potential stress on its oligotrophy. However, dredge and net collections, which are dominated by chironomids and cladocerans, respectively, contained very few organisms. Plankton was most abundant in the surface water.Low production of organisms is partly the result of the heavy rainfall which dilutes the trophic stratum above the hypolimnion, and the small amount of sunlight reaching the lake.

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