Strontium isotopic characterization of the Palmottu hydrosystem (Finland): water–rock interaction and geochemistry of groundwaters

The Palmottu hydrosystem is located in a granitic host rock in southern Finland. Along well‐defined pathways in the fractured crystalline rock, strontium isotopes are used to trace the degree of water–rock interaction (WRI) and mixing processes in groundwaters. The ⁸⁷Sr/⁸⁶Sr ratios range between 0.716910 and 0.735606 in the surface waters and between 0.719991 and 0.750787 in the groundwaters, but are between 0.720 and 0.735 in most of the samples. Moreover, the results show a lack of correlation between the water chemistries determining the classification into different water‐types (Na–Cl, Na–SO₄, etc.) and the results of the strontium (Sr) contents and Sr isotopic ratios. From a WRI standpoint, this implies that the Sr behaviour is independent of the water chemistry; the occurrence of large ⁸⁷Sr/⁸⁶Sr variations is site specific and mainly dependent on the lithology. A model to determine the ⁸⁷Sr/⁸⁶Sr ratio of water after interaction with granite was developed. This model is based on the assumption that Sr was derived from three minerals: plagioclase, K‐feldspar and biotite. The results of the calculation indicate that around half of the water analysed within the Palmottu hydrosystem can be explained by the weathering of the granites. However, clearly lower ⁸⁷Sr/⁸⁶Sr are observed in waters when compared to the calculated ⁸⁷Sr/⁸⁶Sr and other sources of Sr, with low ⁸⁷Sr/⁸⁶Sr, rather than the calculated granite–water interaction, which may be suspected. When comparing the ⁸⁷Sr/⁸⁶Sr and ion ratios (Ca/Na, Mg/Na, Sr/Na, Cl/Na), the scattering of the data can be explained by the presence of four end‐members: a brine component (low ⁸⁷Sr/⁸⁶Sr and Ca/Na ratios…), a deep granitic component (high ⁸⁷Sr/⁸⁶Sr ratios and low Ca/Na ratios…), a subsurface component (intermediate ⁸⁷Sr/⁸⁶Sr ratios associated with high Ca/Na ratios…) and a surface end‐member:snow and river drainage (low ⁸⁷Sr/⁸⁶Sr and low Ca/Na ratios…). These extreme end‐members define a series of WRI‐mixing line within a rather complex hydrosystem.     

The Icelandic Enlightenment as an Extended Phenomenon

The Enlightenment is a many-sided phenomenon, with different emphases in individual countries, and the period when its influence was greatest differs from country to country. In Icelandic historiography the period traditionally associated with the movement is from c. 1770 to c. 1830. This article examines how the Icelandic Enlightenment can be regarded as an extended phenomenon in that it also exerted considerable influence in the last two-thirds of the 19th century and the early 20th century. The social conditions that contributed to this long period of influence of the movement are dealt with. Among the themes given special attention are the impact of ideas of progress derived from the Enlightenment, the way in which the movement influenced the nationalistic ideas of the Icelanders, and how the emphasis of the champions of the Enlightenment on providing ordinary people with education by means of publication of educational works remained as a guiding principle.     

Rational Goals for the Urban Environment: A Swedish Example

In Sweden, the government's aim to create sustainable urban environments is expressed through the environmental quality objective “A good built environment”. The objective embraces seven sub-goals and is designed to guide central, regional and local authorities’ planning towards urban sustainability. However, for objectives concerning the urban environment, such as the Swedish objective “A good built environment”, to form a solid basis for decision-making, two types of rationality (functionality) conditions ought to be met. First, the objectives should guide and motivate those who are responsible for their implementation. This is applicable when the goals satisfy the criteria of precision, evaluability, approachability and motivity. Second, when the goals are parts of larger goal systems, the goal systems should be coherent. Using the objective “A good built environment” as an empirical basis, this article gives a few examples of how environmental goals can fail to guide and motivate action towards improved urban sustainability.     

Knowledge-based development dynamics in less favoured regions: insights from Australian and Icelandic university towns

Knowledge-based development (KBD) is a widely practiced policy and is signified as an effective development approach particularly for the metropolitan city-region context. Even though, increasing recognition of this policy resulted in some initiatives in less favoured regions – such as regional university towns – its appropriateness for this context has not been investigated adequately. This paper explores the concept thoroughly in regional university town settings from the lens of the triple-helix model – a critical element for success in KBD. The study aims to broaden our understanding on the challenges of implementing a successful triple-helix model in regional university towns by providing evidence from different country contexts – Australia and Iceland. The methodology of the comparative case investigation incorporates policy and stakeholder perception analyses. Results reveal the journey of the investigated cases, their limited accomplishments and failure factors. Findings shed light on the developmental challenges of regional university towns by highlighting critical issues relating to suitability, appropriate implementation and effectiveness of the KBD policy.