Recent Paleolimnology of Three Lakes in Northwestern Minnesota

1976 ◽  
Vol 6 (2) ◽  
pp. 249-272 ◽  
Author(s):  
Hilary H. Birks ◽  
M.C. Whiteside ◽  
Donna M. Stark ◽  
R.C. Bright
Keyword(s):  
Catchment Area ◽  
Plant Macrofossils ◽  
Agricultural Runoff ◽  
Water Volume ◽  
Sedimentation Rates ◽  
Minnesota Lakes ◽  
Types Of Information ◽  
The City ◽  
Integrated Study ◽  
Elk Lake

A paleolimnological study was undertaken to investigate changes in three Minnesota lakes over the last 100 years and to demonstrate the stratigraphic effects of cultural eutrophication in two of them. The study combined the analysis of the lake sediment from short cores with stratigraphic analyses of pollen, plant macrofossils, mollusks, diatoms and certain other algae, chydorid Cladocera, and Daphnia ephippia.The rise of Ambrosia type pollen (ragweed) marks the onset of interference with the landscape by European man, which can be closely dated. Calculations of sedimentation rates from this base gave reasonable correlations of other stratigraphic events with historical events.Elk Lake is considered “unpolluted” today and was chosen as a control. Man's effects are limited to logging some of the surrounding forest and to the construction of a dam. Small changes in the lake's fauna and flora are demonstrated, showing the sensitivity of the lake to changes in its catchment area.Lake Sallie and St. Clair Lake, in the same watershed as the city of Detroit Lakes, have been affected not only by logging but also by addition of nutrients from agricultural runoff and sewage effluent. Considerable responses by the lake organisms are apparent. In Lake Sallie the changes were gradual, but in St. Clair Lake they were very abrupt because the lake was partially drained at the same time and the water volume was thereby reduced.The merits of such an integrated study, the types of information gained from the analyses of the various fossils, and the wider application of the results are discussed.

scholarly journals Parking Places to Moped-Style Scooter Sharing Services Using GIS Location-Allocation Models and GPS Data

2021 ◽  
Vol 10 (4) ◽  
pp. 230
Author(s):  
Onel Pérez-Fernández ◽  
Juan Carlos García-Palomares
Keyword(s):  
Global Positioning System ◽  
Catchment Area ◽  
Public Spaces ◽  
Gps Data ◽  
Positioning System ◽  
Urban Centers ◽  
Location Allocation ◽  
Global Positioning ◽  
The City

Moped-style scooters are one of the most popular systems of micro-mobility. They are undoubtedly good for the city, as they promote forms of environmentally-friendly mobility, in which flexibility helps prevent traffic build-up in the urban centers where they operate. However, their increasing numbers are also generating conflicts as a result of the bad behavior of users, their unwarranted use in public spaces, and above all their parking. This paper proposes a methodology for finding parking spaces for shared motorcycle services using Geographic information system (GIS) location-allocation models and Global Positioning System (GPS) data. We used the center of Madrid and data from the company Muving (one of the city’s main operators) for our case study. As well as finding the location of parking spaces for motorbikes, our analysis examines how the varying distribution of demand over the course of the day affects the demand allocated to parking spaces. The results demonstrate how reserving a relatively small number of parking spaces for scooters makes it possible to capture over 70% of journeys in the catchment area. The daily variations in the distribution of demand slightly reduce the efficiency of the network of parking spaces in the morning and increase it at night, when demand is strongly focused on the most central areas.

Natural and anthropogenic impacts on the composition of lake sediments

2008 ◽  
Vol 72 (1) ◽  
pp. 411-413 ◽  
Author(s):  
T. Eskola ◽  
V. Peuraniemi
Keyword(s):  
World War Ii ◽  
Lake Sediments ◽  
Human Impact ◽  
Catchment Area ◽  
Anthropogenic Impacts ◽  
Heavy Traffic ◽  
World War ◽  
Small Lakes ◽  
Anthropogenic Effect ◽  
The City

AbstractLake sediments were studied from four lakes in environmentally different areas in northern Finland. Lakes Pyykösjärvi and Kuivasjärvi are situated near roads with heavy traffic and the city of Oulu. Lakes Martinlampi and Umpilampi are small lakes in a forest area with no immediate human impact nearby. The concentration of Pb increases in the upper parts of the sedimentary columns of Lake Kuivasjärvi and Lake Pyykösjärvi. This is interpreted as being an anthropogenic effect related to heavy traffic in the area and use of Lake Pyykösjärvi as an airport during World War II. High Ni and Zn concentrations in the Lake Umpilampi sediments are caused by weathered black schists. Sediments in Lake Martinlampi show high Pb and Zn contents with increasing Pb concentrations up through the sedimentary column. The sources of these elements are probably Pb-Zn mineralization in the bedrock, Pb-Zn-rich boulders and anomalous Pb and Zn contents in till in the catchment area of the lake.

scholarly journals Assessment of the water pollution level and the environmental status of rivers in the Siverskyi Donets basin by BOD5

2020 ◽  
pp. 91-101
Author(s):  
N. S. Loboda ◽  
І. V. Katynska ◽  
О. V. Smalii
Keyword(s):  
Water Quality ◽  
River Water ◽  
Catchment Area ◽  
Donets Basin ◽  
Pollution Level ◽  
Early 21St Century ◽  
Main River ◽  
Environmental Status ◽  
The City ◽  
Hydrochemical Index

The paper topicality consists in the necessity for determination of the environmental status of the rivers in the Siverskyi Donets Basin and assessment of the possibilities for them to achieve ‘good environmental status’ under the modern climatic conditions and the anthropogenic load. Siverskyi Donets is the main river in the Eastern Ukraine. There are large industrial zones at the water catchment area. Among them, there are the Donetsk Coal Basin and the industrial complexes within the City of Kharkiv, which have exerted influence on surface water quality for decades. A method for assessment of the pollution level and the environmental status of waters by the hydrochemical index of BOD5 (biochemical oxygen demand for 5 days) is used in the paper. The paper is aimed at identification of the main trends in water quality changes by hydrochemical index of BOD5. The object of research is a pollution of the rivers at the Siverskyi Donets Basin by industrial, municipal and mine wastewaters. The subject of research is an assessment of water qualitative status by BOD5. The hydrochemical observation data for 7 gauges at the main river and 7 tributaries for the period of 1990-2015 were used in the paper. The major attention is focused on the most polluted rivers in the Eastern Ukraine: the Udy and the Kryvyi Torets. The quality of the Udy River water is largely determined by the municipal wastewater from Kharkiv. The Kryvyi Torets River belongs to the Donbas rivers, where pollution by mine water and wastewater from industrial enterprises is significant. Pollution levels, environmental status and saprobity were determined by the average annual indices of BOD5. Empirical probabilities for occurrence of a certain pollution parameter at various gauges were calculated for comparative analysis. It is found that a BOD5 downward trend has been prevalent on the rivers at the Siverskyi Donets catchment area in the early 21st century. The highest BOD5 values were observed on the Donbas tributaries and the Udy River (downstream from the City of Kharkiv), as well as upstream and downstream from Lysychansk, and the lowest ones were observed on the Oskil River. It is also revealed that in the early 21st century, the main river water has a ‘threshold’ environmental status (β-mesosaprobic zone), except for the Lysychansk gauge, where the status is ‘irreversibly altered’ owing to the inflow of polluted water from Donbas rivers into the Siverskyi Donets. Research into the Udy River water quality upstream and downstream from the industrial city of Kharkiv has shown that the water in the upper reaches of this river is classified as ‘clean’ and ‘moderately polluted’, and the environmental status may become ‘good’ in the future. Downstream from the city, the water is mostly ‘dirty’, and the environmental status is ‘irreversibly altered’, which corresponds to the α-mesosaprobic zone. For the Kryvyi Torets River (the Donbas Region), owing to the impact of organic pollution, the environmental status is defined as ‘threshold’, ‘irreversibly altered’ and it has begun to deteriorate in recent years. To improve the environmental status of the Donbas rivers, the reduction in discharges of untreated municipal and industrial wastewater into surface watercourses, as well as the construction of state-of-the-art sewage treatment plants are necessary.

Dominant Factors Influencing Overall Temporal Sedimentation Rates at Loagan Bunut Lake, Miri, Sarawak, Malaysia.

2011 ◽  
Vol 356-360 ◽  
pp. 2406-2415 ◽  
Author(s):  
R.B. Dagang ◽  
S. Lau ◽  
A.K. Sayok
Keyword(s):  
Suspended Sediment ◽  
Sedimentation Rate ◽  
Settling Velocity ◽  
Flood Plain ◽  
Water Volume ◽  
Sedimentation Rates ◽  
Sediment Distribution ◽  
Factors Influencing ◽  
Physical Changes ◽  
Best Fit

This paper is to predict dominant factors influencing temporal sedimentation rates at Loagan Bunut Lake using best-fit model of sedimentation rate and distance from Bunut River. The lake is a flood plain lake located in Sarawak, Malaysia. Twenty two cylindrical traps were installed at the lake from November 2005 until April 2008. Each sample was collected after about four to five months of deployment. Dry sedimentation rates from the traps and the linear distances from Trap 1 located at the confluence of Bunut River were measured. The factors that influence the temporal sedimentation at the lake were both internal and external physical changes of the lake. The factors were net ws (net Stoke’s settling velocity) and water volume in the lake for suspended sediment distribution.

scholarly journals Accuracy of The Level of Critical Water Catchment Area for Flood Mitigation Around Bengkulu City, Indonesia

2021 ◽  
Vol 53 (2) ◽  
Author(s):  
Bambang Sulistyo ◽  
Hery Suhartoyo ◽  
Teguh Adiprasetyo ◽  
Kanang Setyo Hindarto ◽  
Noviyanti Listyaningrum
Keyword(s):  
Catchment Area ◽  
Flood Mitigation ◽  
Disaster Mitigation ◽  
Threshold Values ◽  
Reasonable Accuracy ◽  
Water Catchment Area ◽  
Catchment Areas ◽  
Flooded Area ◽  
Water Catchment ◽  
The City

Disaster mitigation activities require the availability of a potentially flooded area (PFA) map. One of the causes of flooding is the criticality of water catchment areas; the higher the criticality level, the higher the flooding potential. This study aims to determine the accuracy of the model for determining the PFA around Bengkulu City, which was derived from the Level of Critical Water Catchment Area (LCWCA) model developed by the Ministry of Forestry. After obtaining the LCWCA Map, another analysis was performed in order to obtain the PFA Map. Furthermore, the overlaying was carried out with the Existing Flood Map in such a way that the level of accuracy is known. The threshold values from Justice are used to justify the level of accuracy in three categories, namely Good (> 85%), Moderate (70 - 85%), and Poor (<70%). The results showed that in the eight sub-watersheds around the city of Bengkulu, there were two sub-watersheds with reasonable accuracy (> 85%), which means that there was > 85% overlap between areas on the Potentially Flooded Area Map as a result of the analysis of The LCWCA with the area on the Existing Flood Map. There are three sub-watersheds with Moderate accuracy (70 - 85%) and three sub-watersheds with Poor accuracy (<70%)

scholarly journals Hydrological Characteristics of Kaligarang Watershed

2004 ◽  
Vol 14 (1) ◽  
Author(s):  
Soewarno Soewarno ◽  
Srimulat Yuningsih
Keyword(s):  
Return Period ◽  
Catchment Area ◽  
Water Volume ◽  
Runoff Coefficient ◽  
Central Java ◽  
Flood Discharge ◽  
Yearly Average ◽  
Time Of Travel ◽  
Upstream Catchment ◽  
Rising Time

This paper is a result of research concerning hydrological characteristic in the Garang Catchment Area. At present tha catchment area is often facing the problem of flooding in the dense populated area with cause a lot of loos in Semarang City. This research is aimed at studying hydrological harateristic in the Garang Catchment Area. Hydrological data are obtain from direct measurement at the stream gauging stations in the Garang Catchment Area and collected from Balai Hidrologi Office at Pusat Litbang Teknologi Sumber Daya Air in Bandung and from Hydrological Unit of Central Java Province. From this research were known the rainfall depth, their distribution and their return period; runoff coefficient; streamflow volume; dependable flow; flood discharge characteristi; and minimum discharge. From the some occuring flood indicates of the runoff coefficient is about 0.70. The water volume wasted to the sea is about 195 million m3/year. Yearly average of the dependable flow at stream gaunging stations: Garang – Pajangan  is about 2.28 m3/sec; Garang – Patemon is about 0.92 m3/sec and Kreo – Pancur is about 1.26 m3/sec. Yearly mean of annual flood discharge at Garang – Pajangan is about 435 m3/sec. The maximum capacity of river channel is about 485 m3/sec. The flood discharge characteristic are as follows: time of travel of flood is generally one km/hour approximately, rising time is about 3 hours and time of recession is about 6 – 11 hours. The floods, they are generally occur at the night. Flush flood of 1022 m3/sec occured on January 26, 1990 is estimated on 50 year return period, with 15 year return period of rainfall. The range of minimum discharge is about 0.43 – 3.15 m3/sec. The maximum discharge is about 47.2 – 1118 times of the minimum discharge. Design of the dam in Kreo River at Jatibarang and Kripik River at Mundingan, also increasing of the reforestation area in the upstream catchment are an alternative to reduce the Garang River peak flood.

scholarly journals Prosedur Administrasi Pelayanan Pemakaman Pada TPU Tegal Alur Unit II Islam Jakarta Barat

2019 ◽  
Vol 3 (1) ◽  
pp. 149-156
Author(s):  
Akhmad Nurdiansyah ◽  
Ria Andriani ◽  
Dwi Puji Hastuti
Keyword(s):  
Qualitative Research ◽  
Research Methods ◽  
Catchment Area ◽  
Open Space ◽  
Qualitative Research Methods ◽  
Local Residents ◽  
The City ◽  
Descriptive Qualitative

The place funeral general which serves as a burial place for people who died. Funeral general also has other functions such as the Green Open Space, catchment area water, and lungs of the city. The author uses descriptive qualitative research methods. Sources of data in this study were obtained using the data used, interviews and documentation TPU Tegal Alur Unit II Islam which located in Jl.Kamal Raya No.1A. Kelurahan Tegal Alur. Kecamatan Kalideres. Kota Administrasi Jakarta Barat 11820. As well as interviews with that related source. The place funeral general tegal alur is a public cemetery that stands from the wakaf land owned by local residents. At the tomb was previously there is a tomb of Muslims and non-Muslims. TPU Tegal Alur Unit II Islam other than moving in service funeral, as providing information on funerals and retribution rates in general. TPU Tegal Alur Unit II Islam also one of the manufacturers for finance area ie within retribution service funeral.Keywords: Procedure, Administration, Service

scholarly journals Assessment of Minimum Water Level in Lakes and Reservoirs Based on Their Morphological and Hydrological Features

Hydrology ◽  
2020 ◽  
Vol 7 (4) ◽  
pp. 83
Author(s):  
Charalampos Doulgeris ◽  
Panagiota Koukouli ◽  
Pantazis Georgiou ◽  
Paschalis Dalampakis ◽  
Dimitrios Karpouzos
Keyword(s):  
Water Level ◽  
Catchment Area ◽  
Abiotic Factors ◽  
Environmental Water ◽  
Water Volume ◽  
Lake Ecosystem ◽  
Economic Activities ◽  
Northern Greece ◽  
Long Time ◽  
Lakes And Reservoirs

The sustainable management of lakes and reservoirs requires the determination of their minimum environmental water level. Even though the assessment of minimum water level depends on a number of biotic and abiotic factors of the lake ecosystem, in many cases these factors are not entirely known and, furthermore, their evaluation is usually a challenging and laborious task. On the other hand, the lakes/reservoirs may comprise an important water resource to meet the requirements arising from economic activities. In this paper, the morphological and hydrological features of four lakes of northern Greece were analysed in order to assess their minimum environmental water level. The hydromorphological analysis was based on the relationship of the lake surface area and volume with water level as well as the water inflow from the lake’s hydrological catchment area, considering as the lake’s critical volume storage, the annual water volume flowing into a lake from its hydrological catchment area with a probability of exceedance 50% of a long time series of hydrological years. By combining morphological and hydrological features, the proposed methodology aimed to extend the analysis based solely on morphological features, and assess more comprehensively the minimum environmental water level in the four lakes, ensuring also the rising from the minimum level to the maximum (overflow) level for most of the hydrological years.

scholarly journals Causes and Effects of Water Consumption Drop by the Population of Cities in Poland - Selected Aspects

2015 ◽  
Vol 27 (27) ◽  
pp. 67-79 ◽  
Author(s):  
Marcin Gorączko ◽  
Rafał Pasela
Keyword(s):  
Water Consumption ◽  
Water Volume ◽  
Total Water ◽  
Official Statistics ◽  
Factors Affecting ◽  
City Population ◽  
Household Water ◽  
Daily Water ◽  
The City ◽  
Daily Water Consumption

Abstract The article presents, with an example of four cities of various size, a phenomenon of a drop in water consumption by the city population in Poland. The paper draws on 1995-2012 official statistics. A significant decrease in household water consumption was observed, which refers to both the total water volume used by households as well as the average daily water consumption per resident. The article also determines the most essential factors affecting the amount of water consumed, out of which the price of water appears to be of the most significant one.

scholarly journals Spatial differentiation of urban population change in Russia

2017 ◽  
Vol 38 (38) ◽  
pp. 143-162
Author(s):  
Rafał Wiśniewski
Keyword(s):  
Catchment Area ◽  
Urban Population ◽  
Population Change ◽  
Spatial Differentiation ◽  
Population Changes ◽  
The City ◽  
Moscow Population

AbstractThe demographic transformations in Russia have led to changes in the country’s urban population (population of cities and urban-type settlements), which declined by 3.3% in the years 1989-2010. However, the population of cities as such increased over the same period by 1.5%, mainly as a result of the huge growth in the population of Moscow. Population changes in Russian cities vary depending on the size of the city. The greatest change was observed, above all, in small peripheral cities, which lost as much as half of their population. However, even more alarming are the trends observed in the smaller cities of the historical heart of Russia, which fall within the catchment area of Moscow (and its aglomeration) and cities of supraregional importance. Such cities have been depopulating as fast as Siberian cities.

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