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Groundwater often remains a neglected natural resource in archaeological studies in the Near East. Here we examine the potential role of aquifers in transitional phenomena in the eastern Mediterranean at the Early Bronze Age (EBA) – Middle Bronze Age (MBA) boundary using geographic relations between aquifers and archaeological settlements. As a basis for this analysis, the aquifer areas within buffers zones of 5, 10 and 20 km around the sites were used. For comparison, the total watercourse lengths within the same zones were calculated. Although no substantial changes in watercourse lengths could be found, the aquifer geography around EBA and MBA sites did show regional differences. The proportion of settlements with aquifers in upper Mesopotamia and the northern Levant doubled during the transition from EBA to MBA, whereas in the southern Levant this proportion decreased. We propose several explanatory models for these results: environmental (desiccation regional trend around 4.2 ka BP), non-environmental (changes in strategic importance, subsistence economy or hygienic requirements) and combined (human-induced transformation in the vegetation, changes in soil properties or changes in human perception of the environment followed by changes in behavioral attitudes). This study further emphasizes the potential of GIS-based spatial analysis applications in archaeology. [ABSTRACT FROM AUTHOR]

Abstract: It has been suggested that pedogenic carbonate coatings on stones in archaeological sites can be used to reconstruct late Quaternary environmental changes in the area of the Fertile Crescent. This research compares a pedogenic carbonate record from southeastern Turkey with three other local or regional sources of palaeoenvironmental information in order to evaluate the correlation of this new proxy with other independent data from the area: (1) ancient plant macroremains from archaeological sites as ecological indicators, (2) stable carbon isotope composition of ancient plant macroremains available in the literature and from our own investigations in six mid-Holocene archaeological sites, and (3) modelled Holocene precipitation and temperature changes in the northern Fertile Crescent. Comparison involved selected palynological and isotopic data from lacustrine sediments as well as speleothem isotopic records in Near Eastern locations available in the literature. Although the data show a certain amount of variation of proxy records on the regional scale, for the northern Fertile Crescent (Upper Mesopotamia) they suggest three pronounced features of the Holocene environmental history: (1) a trend toward warmer temperatures may have affected the area during the early Holocene (between ca. 10,000–6000cal BP), (2) increased moisture availability and relatively high temperatures in the mid-Holocene (ca. between 5000 and 4000cal BP), and (3) a significant decrease in moisture availability around 4000cal BP. Further research is needed to enhance the chronological resolution of both pedogenic carbonate and plant macrofossil records. This study stresses the complexity of the Holocene palaeogeography of the Near East and underlines the need for careful analysis of local sources of palaeonvironmental information in the region. [Copyright &y& Elsevier]