Suvremeni aspekti geografske regionalizacije i upravno-teritorijalni ustroj Hrvatske

Considering some contemporary aspects of the geographical regionalization and administrative-territorial organization of Croatia, the author introduces the thematic through a retrospect of geographic thought development in the question of regionalisation. Main changes in administrative-territorial organization of Croatia from World War II to the beginning of the 21st century as well as some problems of applying geographical regionalization principles in the defining of regional units have been discussed. Finally the characteristics of the actual regionalization in Croatia have been analysed and an attempt of defining the functional regionalization of the country in the contemporary circumstances at the beginning of the 21st century has been given.

Use of Constraints in the Hierarchical Aggregation Procedure Intramax

Background:Intramax is a hierarchical aggregation procedure for dealing with the multi-level specification problem and with the association issue of data set reduction, but it was used as a functional regionalization procedure many times in the past.Objectives:In this paper, we analyse the simultaneous use of three different constraints in the original Intramax procedure, i.e. the contiguity constraint, the higher-inner-flows constraint, and the lower-variation-of-inner-flows constraint.Methods/Approach:The inclusion of constraints in the Intramax procedure was analysed by a programme code developed in Mathematica 10.3 by the processing time, by intra-regional shares of total flows, by self-containment indexes, by numbers of singleton and isolated regions, by the number of aggregation steps where a combination of constraints was applied, by the number of searching steps until the combination of constraints was satisfied, and by surveying the results geographically.Results:The use of the contiguity constraint is important only at the beginning of the aggregation procedure; the higher-inner-flows constraint gives singleton regions, and the lower-variation constraint forces the biggest employment centre as an isolated region up to a relatively high level of aggregation.Conclusions:The original Intramax procedure (without the inclusion of any constraint) gives the most balanced and operative hierarchical sets of functional regions without any singletons or isolated regions.

Application of Fuzzy Cluster Methods to Atmospheric Functional Regionalization in Baotou, Inner Mongolia

Air environmental quality data (SO2, NO2, and PM10) of six automatic monitoring points monitored in 2010 and fuzzy clustering analysis method were applied to regionalize the atmospheric functional regions in Baotou City. It was demonstrated that the atmospheric functional regions were divided into two classes, which is consistent with the regional actual situation. This study provides a scientific basis for the comprehensive improvement of the urban environmental planning.

Estimation of environmental flow requirements for the river ecosystem in the Haihe River Basin, China

The temporal and spatial environmental flow requirements (EFRs) for the river ecosystem of the Haihe River Basin were analyzed based mainly on the eco-functional regionalization of available water resources. The annual EFRs for the river ecosystem of the Haihe River Basin were 47.71 × 108 m3, which accounted for 18% of the average annual flow (263.9 × 108 m3). The EFRs for river reaches, wetlands, and estuaries were 22.67, 15.32 and 9.72 × 108 m3, respectively. Moreover, the EFRs for the river ecosystem during the wet (June to October), normal (April, May, November), and dry (December to March) periods were 29.99, 9.51 and 8.21 × 108 m3, respectively. Thus, toward a more integrated water resource allocation in the Haihe River Basin, the primary effort should focus on meeting the EFRs for river systems located in protected areas during the dry period.