Simulation of event-based and long-term spatial redistribution of Chernobyl-derived radiocaesium within catchments using geographical information system embedded models

2003 ◽  
Vol 17 (5) ◽  
pp. 943-957 ◽  
Author(s):  
Marcel van der Perk ◽  
Ondrej Slávik
Keyword(s):  
Information System ◽  
Geographical Information System ◽  
Geographical Information ◽  
Spatial Redistribution ◽  
Event Based

A decision support system that links short-term silvicultural operating plans with long-term forest-level strategic plans

1993 ◽  
Vol 23 (6) ◽  
pp. 1078-1095 ◽  
Author(s):  
Robert G. Davis ◽  
David L. Martell
Keyword(s):  
Information System ◽  
Decision Support ◽  
Decision Support System ◽  
Geographical Information System ◽  
Support System ◽  
Planning Horizon ◽  
Geographical Information ◽  
Timber Species ◽  
Short Term

This paper describes a decision support system that forest managers can use to help evaluate short-term, site-specific silvicultural operating plans in terms of their potential impact on long-term, forest-level strategic objectives. The system is based upon strategic and tactical forest-level silvicultural planning models that are linked with each other and with a geographical information system. Managers can first use the strategic mathematical programming model to develop broad silvicultural strategies based on aggregate timber strata. These strategies help them to subjectively delineate specific candidate sites that might be treated during the first 10 years of a much longer planning horizon using a geographical information system and to describe potential silvicultural prescriptions for each candidate site. The tactical model identifies an annual silvicultural schedule for these candidate sites in the first 10 years, and a harvesting and regeneration schedule by 10-year periods for aggregate timber strata for the remainder of the planning horizon, that will maximize the sustainable yield of one or more timber species in the whole forest, given the candidate sites and treatments specified by the managers. The system is demonstrated on a 90 000 - ha area in northeastern Ontario.

scholarly journals GIS-BASED ANALYSIS ACCESSIBILITY TO DESTINATIONS BASED ON PUBLIC TRANSPORT

2021 ◽  
Vol 25 (5) ◽  
pp. 15-25
Author(s):  
Ayah A. Hussein ◽  
◽  
Noor M. Asmael ◽  
Keyword(s):  
Information System ◽  
Geographical Information System ◽  
Public Transport ◽  
Transportation Networks ◽  
Transport Network ◽  
Geographical Information ◽  
Population Coverage ◽  
Coverage Area ◽  
Additional Service

Baghdad city depended on the private auto in transport and this led to great problems with increasing congestion and traffic problems. Existing public transport suffers from poor accessibility to opportunities which is considered the main existing problem. The local agency decided to construct Baghdad Elevated Train as one of the keys to solve this problem and decrease congestion. This study aims to discuss the changes that the installing of the planned train line could make, by using the Geographical Information System (GIS) to model the transportation networks (sidewalks, public transport network, and the planned elevated train) for two scenarios, first for the current public transport network and second for the long-term situation of the adding of the planned train, furthermore, to find the coverage area for each station and determine the population can be served for each station depending on the census of the zones for the year 2020. The modeled network databases were used to create the closest facility between the centroid of the 43 zones and the selected facilities (Commercial, Educational, Governmental, and Hospitals). The results revealed that the additional service of the train reduced the travel time between Al-Sadr City to four destinations selected for the mentioned facilities by the following percentages (62%, 40%, 46%, and 65%) respectively. Moreover, the population coverage stated that stations 8, 9, and 10 are the most populated.

Naturnähe von Waldbeständen messen und überwachen | Measuring and Controlling Near-to-Nature Forest Stands

1999 ◽  
Vol 150 (7) ◽  
pp. 246-248
Author(s):  
Erich Tiefenbacher
Keyword(s):  
Information System ◽  
Geographical Information System ◽  
Geographical Information ◽  
Deciduous Trees ◽  
Forest Stands ◽  
Forest Owners ◽  
Forest Society ◽  
Controlling Parameter ◽  
Regional Forest

In order to use the degree of nearness to nature as controlling parameter, a simple methodology has been developed with regard to the regional forest plan of Weinfelden (forest development plan). It is based on the extent of deviation from the existing share of deciduous trees to the minimal share aimed for. This again can be fixed individually for each forest society – with a near-to-nature silviculture as a precondition. According to this methodology, about one third of the forests of central Thurgau can be described as near-to-nature forests. The chosen approach is rather rough, the necessary data, however, are quickly available with no further long-term costs as they are being evaluated in the course of the regular forestry planifica-tion anyway. For reasons of demonstration for foresters, forest owners, communal authorities and the population in general, easily understandable maps can be generated by means of a geographical information system. These show the degree of nearness to nature very clearly and thus the focus at future converting activities.

scholarly journals Geographical Information System for Epidemiological Surveillance of Natural Focal Infectious Diseases in Combined Foci in the Territory of the Astrakhan Region

2010 ◽  
pp. 35-38 ◽  
Author(s):  
V. A. Safronov ◽  
A. S. Razdorskiy ◽  
S. Yu. Skalenko ◽  
A. A. Lopatin ◽  
A. I. Kovtunov ◽  
...  
Keyword(s):  
Information System ◽  
Spatial Analysis ◽  
Infectious Diseases ◽  
Geographical Information System ◽  
Predictive Value ◽  
Geographical Information ◽  
Epidemiological Surveillance ◽  
High Effectiveness ◽  
Epidemiologic Surveillance

Spatial analysis of long-term combined epidemic manifestations of some natural focal infectious diseases in the territory of the Astrakhan region was carried out using geographical information system. Suggested is the method to detect territories where these combined epidemic manifestations are stable and its high effectiveness and predictive value are demonstrated. On the basis of received data suggested are the measures to increase the effectiveness of epidemiologic surveillance for natural focal infectious diseases.

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