Topographical, structural and geophysical characterization of fracture zones : implications for groundwater flow and vulnerability

The main objective of this study is to evaluate selected geophysical, structural and topographic methods on regional, local, and tunnel and borehole scales, as indicators of the properties of fracture zones or fractures relevant to groundwater flow. Such information serves, for example, groundwater exploration and prediction of the risk of groundwater inflow in underground construction. This study aims to address how the features detected by these methods link to groundwater flow in qualitative and semi-quantitative terms and how well the methods reveal properties of fracturing affecting groundwater flow in the studied sites. The investigated areas are: (1) the Päijänne Tunnel for water-conveyance whose study serves as a verification of structures identified on regional and local scales; (2) the Oitti fuel spill site, to telescope across scales and compare geometries of structural assessment; and (3) Leppävirta, where fracturing and hydrogeological environment have been studied on the scale of a drilled well.The methods applied in this study include: the interpretation of lineaments from topographic data and their comparison with aeromagnetic data; the analysis of geological structures mapped in the Päijänne Tunnel; borehole video surveying; groundwater inflow measurements; groundwater level observations; and information on the tunnel's deterioration as demonstrated by block falls. The study combined geological and geotechnical information on relevant factors governing groundwater inflow into a tunnel and indicators of fracturing, as well as environmental datasets as overlays for spatial analysis using GIS. Geophysical borehole logging and fluid logging were used in Leppävirta to compare the responses of different methods to fracturing and other geological features on the scale of a drilled well.Results from some of the geophysical measurements of boreholes were affected by the large diameter (gamma radiation) or uneven surface (caliper) of these structures. However, different anomalies indicating more fractured upper part of the bedrock traversed by well HN4 in Leppävirta suggest that several methods can be used for detecting fracturing.Fracture trends appear to align similarly on different scales in the zone of the Päijänne Tunnel. For example, similarities of patterns were found between the regional magnetic trends, correlating with orientations of topographic lineaments interpreted as expressions of fracture zones. The same structural orientations as those of the larger structures on local or regional scales were observed in the tunnel, even though a match could not be made in every case. The size and orientation of the observation space (patch of terrain at the surface, tunnel section, or borehole), the characterization method, with its typical sensitivity, and the characteristics of the location, influence the identification of the fracture pattern. Through due consideration of the influence of the sampling geometry and by utilizing complementary fracture characterization methods in tandem, some of the complexities of the relationship between fracturing and groundwater flow can be addressed.The flow connections demonstrated by the response of the groundwater level in monitoring wells to pressure decrease in the tunnel and the transport of MTBE through fractures in bedrock in Oitti, high­light the importance of protecting the tunnel water from a risk of contamination. In general, the largest values of drawdown occurred in monitoring wells closest to the tunnel and/or close to the topographically interpreted fracture zones. It seems that, to some degree, the rate of inflow shows a positive correlation with the level of reinforcement, as both are connected with the fracturing in the bedrock.The following geological features increased the vulnerability of tunnel sections to pollution, especially when several factors affected the same locations: (1) fractured bedrock, particularly with associated groundwater inflow; (2) thin or permeable overburden above fractured rock; (3) a hydraulically conductive layer underneath the surface soil; and (4) a relatively thin bedrock roof above the tunnel. The observed anisotropy of the geological media should ideally be taken into account in the assessment of vulnerability of tunnel sections and eventually for directing protective measures

Constituting play connection with very young children : Adults' active participation in play

A large body of educational research has focused on play as one of children's own activities, however, considerably less attention has been paid to structures and practices associated with joint play between adults and children. This article contributes to this line of research by analyzing adults' participation in joint play with very young children. The data consist of 10 rich make-believe play cases taken from 150 h of videotaped, naturally occurring interactions in a group care setting. The results show that the ability of adults to build sustained co-participation in play with very young children demands delicately timed observations, initiatives and responses with attuned and coordinated use of gesture, gaze and talk. In all, this study provides one way to study and understand better what adults are doing in practice while they are actively co-participating in play. Pedagogical implications for early childhood education are discussed.Peer reviewe

Emotional and Playful Stance Taking in Joint Play between Adults and Very Young Children

The purpose of this single case study was to investigate emotional and playful stance taking in adults and very young children as they engage in joint make-believe play activity in a natural Finnish group-care setting. Drawing on the sequential approach of conversation analysis (CA), the study represents an effort to understand play in an early childhood education (ECE) setting from both children's and adults' perspectives at the same time. The results suggest that the interplay of emotional and playful stance taking in make-believe play produces emotional transitions in interaction. These transitions can be understood as interactional accomplishments that offer children and adults the possibility to align and affiliate themselves with their own and each other's emotional experiences and to explore personal reflections of the emotionally heightened real-life trajectories in a shared make-believe play frame. Based on these findings, it is argued that creating and maintaining emotionally heightened joint play with very young children requires adults' emotional involvement and delicately calibrated participation through leading, following and leading by following. Further empirical study is needed to investigate sequences in which playful and emotional stance taking stand in a non-aligning and non-affiliating relationship. Such research could reveal problem-remedy sequences more evidently and provide important further development of ECE theory and practice for children under the age of three.Peer reviewe

Erotilanteet varhaiskasvatuksen aloituksessa – Miten aikuinen kohtaa itkevän lapsen?

Peer reviewe

Erotilanteet varhaiskasvatuksen aloituksessa – Miten aikuinen kohtaa itkevän lapsen?

Peer reviewe

Children's everyday manifestations of grief and grieving in early childhood education and care

This article investigates children's everyday manifestations of grief and grieving situations. Medical and psychological approaches to grief and grieving usually focus on the death of loved ones. It is argued that everyday grief and grieving in early childhood education and care (ECEC) is present in social situations where loneliness and withdrawal are experienced by children. A cultural-historical approach was used to examine everyday grief and grieving in the preschool setting. Video observations were made of Mayra, a 5-year-old girl living in a rural Mexican community. The findings show that grief and grieving are affected by children's social situations, the material conditions of the location and the adult's role in compassionate approach in alleviating grief. Implications from this study highlight the need to examine everyday situations where children experience loneliness and withdrawal when relating to peers as a part of children's larger frame of grief.Peer reviewe

Studying Compassion in the Work of ECEC Educators in Finland : A Sociocultural Approach to Practical Wisdom in Early Childhood Education Settings

In recent years, in the wake of a growing number of studies highlighting the beneficial impact of quality early childhood education and care (ECEC), politicians and other stakeholders have implemented changes in ECEC practitioners’ work conditions via new policies and guidelines. One central theme characterizing these various efforts has been a push toward focusing attention on compassion in ECEC. This chapter discusses the notion of practical wisdom as a lens for viewing acts of compassion in a way that is attentive to the complexity and situational richness of everyday life in ECEC settings. Our sociocultural perspective on compassion highlights practical wisdom and compassion as socially shared and culturally mediated processes that are integral to the ongoing lived practice. Reflecting on such moments offers a possible avenue for change in the interactional and cultural practices of ECEC. Furthermore, we advocate that in efforts to promote compassion in ECEC institutions, primacy should not be placed on creating compassionate individual practitioners but, rather, on the cultivation of cultures of compassion. As such, our chapter study has implications for ECEC practitioners, leaders, and policymakers who wish to promote compassion in ECEC.Peer reviewe

The role of Energy-Water nexus to motivate transboundary cooperation:: An indicative analysis of the Drina River Basin

Hydropower is a key energy source for achieving Sustainable Development Goal 7. Meanwhile, the effects of hydropower development and operation are complex, and potentially a source of tension on transboundary rivers. This paper aims at exploring solutions that consider both energy and water to motivate transboundary cooperation in the operation of hydropower plants (HPPs) in the Drina River Basin (DRB), where the level of cooperation among the riparian countries is low. OSeMOSYS was used to develop a multi-country model with a simplified hydrological system to represent the cascade of HPPs in the DRB. Results show that improved cooperation can increase electricity generation in the HPPs downstream without compromising generation upstream. It also demonstrates the role of inexpensive hydropower in enhancing electricity trade in the region. Implementing energy efficiency measures would reduce the stress on coal power plants, which will mitigate CO2 emissions by about 21% compared to the 2015 level