A coastal management study at areas with steep anaglyph requires detailed knowledge of the onshore surface and subsurface regime regarding the erosional procedures. Active faults produce dynamic and continuously evolving geomorphological structures, which require investigation and continuous monitoring. Detailed mapping on and adjacent to these surfaces is required in order to study the complexity of various tectonic discontinuities, which contribute significantly to erosion and rock-falls resulting rapid and significant changes on the landscape. The technology of ground-based Light Detection and Range (LiDAR) capturing devices is a powerful and valuable tool, providing detailed mapping and surface change detection of inapproachable and nearly vertical surfaces. In this paper we introduce the diachronic monitoring and detection of alterations on the surface of the shore-side active fault of Psatha (Greece), with terrestrial LiDAR scanning, for a state of the art mapping of the almost vertical limestone fault surface. The monitoring procedure includes high-detailed topographic survey at the adjacent area using Real Time Kinematics Global Positioning System equipment (RTK-GPS), which is consisted of a large pile of brittle debris, laying on top the fault surface, by the sea. The described methodology involved the production of a high resolution DEM based on historic topographic maps (scale 1:5,000) of the regional area and comparing it with the higher resolution DEM representing the contemporary morphology, produced by the combination of the fault wall LiDaR “point cloud” and the dense grid of the RTK-GPS measurement points. The comparison between these datasets and recently acquired high resolution IKONOS satellite images revealed impressive surface changes caused mainly by the human intervention as well as the erosional processes which were accelerated due to the absence of safety measures along the coastal zone. Furthermore, the regional subsurface of the hanging wall zone area was also investigated, especially underneath the brittle debris formation, applying the highresolution near surface geophysical technique of Electrical Resistivity Tomography (ERT). Several sections were conducted aiming to represent the subsurface extension of the visible structures in three dimensions and combine it with the aforementioned datasets. The successful combination of different techniques revealed and quantified the landscape evolution involving the surface alternations at the fault adjacent coastal zone, the sea intrusion and even the coastline displacement, during the last four decades. Most of these yielded to the anthropogenic interference on the brittle debris formation and even the construction of the coastal road.

The scope of the research project is to investigate the consequences of climate change on deltaic plains, as one of the most vulnerable coastal and wealth-producing ecosystems. The Pinios river delta, located in the region of Thessaly (Greece) has been selected as a case study, as one of the largest Greek rivers with very limited flow controls. But, despite the fact that deltaic plain is part of the NATURA network, human intervention continuous to occur at an increasing rate. The main objectives of the project are to: (i) study the relative contribution of fluvial fluxes (water/sediment), nearshore hydrodyanmics and climate conditions in the formation and evolution of deltas; (ii) evaluate the impact of human activities in the evolution of the River Pinios delta (e.g., alteration of riverine fluxes, agricultural pollution, over-pumping of the aquifer); (iii) assess and to evaluate quantitatively changes in the deltaic environment for different climate change scenarios, i.e. water balance, issues of water quality, desertification, coastal erosion, inundation; (iv) investigate the interaction between natural processes and parameters associated with socio-economic development and use; (v) develop Sustainable Development Strategies for the natural deltaic system, in order to mitigate the consequences of the climate change, towards a better management of the wealthproducing resources (i.e. fresh water yield); (vi) contribute to the training of young scientists in environmental issues, related to the impact of the climate change on coastal environments; and (vii) disseminate science based management strategies to the local and scientific communities. During the first phase of project implementation, the study of the surface and ground water and their interrelationship is investigated through: (i) the climatological conditions of the deltaic plain and the drainage basin; (ii) the determination of the subsurface geological/stratigraphical information provided by geophysical data; (iii) surface and water fluxes estimated on monthly measurements (quantitative and qualitative) of river flow and phreatic water table.

Extensive ground fissures frequently occur within the eastern Thessaly basin, in central Greece and have been since 1989. This paper aims to give a preliminary explanation for their generation reasons by interpreting the results of a dense geophysical survey along the basin. This is combined with drilling data, as well as field work tectonic measurements, morphotectonic analysis and remote sensing data interpretation throughout the marginal areas of the basin. The gathering, homogenisation and organisation of different types of geo-data by using various GIS software packages led to the discovery of the alpine basement surface, which is covered by recent sediments, and possible structures that contributed to the development of the basin. The methodology of producing a 3D basement surface model and various lithology profiles across the basin, along with sediment isopach maps by combining surface with subsurface data, is described in this paper.

In this paper we present a combination of several near surface geophysicalΒ investigation techniques with high resolution remote sensingΒ image interpretations, in order to define the groundwater flow pathsΒ and whether they can be affected by future seismic events. A seasonalΒ spring (Amvrakia) located at the foot of Meteora pillars near the villageΒ of Kastraki (Greece) was chosen as a test site. The Meteora conglomeraticΒ formations crop out throughout the study area and areΒ characterized by large discontinuities caused by post Miocene till presentΒ tectonic deformation [Ferriere et al. 2011, Royden and PapanikolaouΒ 2011]. A network of groundwater pathways has been developedΒ above the impermeable marls underlying the conglomeratic strata. OurΒ research aims to define these water pathways in order to investigate andΒ understand the exact mechanism of the spring by mapping the exposedΒ discontinuity network with classic field mapping and remote sensingΒ image interpretation and define their underground continuity with theΒ contribution of near surface geophysical techniques. Five Very Low FrequencyΒ (VLF) profiles were conducted with different directions aroundΒ the spring aiming to detect possible conductive zones in the conglomeraticΒ formations that the study area consists of. Moreover, two ElectricalΒ Resistivity Tomography (ERT) sections of a total length of 140m wereΒ carried out parallel to the VLF profiles for cross-checking and verifyingΒ the geophysical information. Both techniques revealed important conductiveΒ zones (<200 Ohm m) within the conglomerate strata, which weΒ interpret as discontinuities filled with water supplying the spring, whichΒ are quite vulnerable to displacements as the hydraulic connections betweenΒ them might be easily disturbed after a future seismic event.