The beaver (castor fiber L.) in the Tigris-Euphrates basin

The distribution of beaver bones in the Tigris-Euphrates basin is reviewed from late Pleistocene to historic times. New archaeological finds are reported from a lowland site on the Syrian steppe. Historical claims for the presence of beavers in this river basin are examined, but most are found wanting in scientific accuracy.     

The contentious politics of hydropower dam impact assessments in the Mekong River basin

Since the 1990s, many large hydropower dams have been built in the Mekong River Basin. There has been considerable concern about resettlement and compensation linked to reservoir flooding, as well as the impacts of dams on wild-capture fisheries, riparian livelihoods, and aquatic biodiversity and ecosystems. Anti-dam activists in the Mekong Basin have contested these impacts by claiming that dam impact assessments limit the spatial scale of recognized impact areas in order to reduce both the political backlash against projects and the costs of dam development. In this article, we consider the contentious politics of hydropower dam impact assessments in order to understand how the spatial strategies of anti-dam activists influence the recognized scale of dam impacts. We analyze three of the most contested hydropower projects in the Mekong River Basin: the operational Pak Mun dam in northeastern Thailand, the recently completed Lower Sesan 2 dam in northeastern Cambodia, and the planned Sambor dam on the mainstream Mekong River in Cambodia. We argue that the recognized scale of impacts is in part an outcome of anti-dam activists’ different spatial imaginaries and associated scale frames—along with those of state actors, business interests, and project consultants—that inform activist strategies for mobilizing geographically dispersed people to make claims about dam impacts. Although activists have sometimes challenged the spatial extent of project impact assessments, they have also sometimes inadvertently adopted strategies to contest dams that have reproduced project scale frames favorable to dam proponents.     

The population of the Amazon basin in 1492: a view from the Ecuadorian headwaters

"Recent archaeological, ethnohistorical and ecological evidence has begun to challenge the view that 'civilizations' failed to develop in the Amazon basin due to limitations of the tropical forest environment. As a result, estimates of the native population in 1492 have become an issue of debate. These estimates are evaluated in the light of the ethnohistorical research on the Ecuadorian headwaters. Estimates are considered by examining estimated habitat densities, the impact of Old World diseases and contemporary evidence for native cultures. The study is based on documents found in archives in Quito, Seville, Madrid and Rome. It is suggested that the population of the Amazon basin in 1492 probably exceeded 5 million but that expectations of substantially higher populations appear unfounded."     

大美柴达木

沿着世界屋脊的青藏线,穿过日月山,跨越橡皮山溯昆仑山的脉络而寻觅,展现在你面前的是群山环绕之间天然镶嵌着的一个巨大的盆地,这就是我国四大盆地之一的柴达木盆地。柴达木盆地,位于青藏高原的东北部,北依祁连山通甘肃敦煌,西缘阿尔金山连新疆塔里木,南屏昆仑山进西藏拉     

The DaVincis of dirt: Geoarchaeological perspectives on Native American mound building in the Mississippi River basin

The complexity of mound construction, as revealed through geoarchaeological analyses, indicates the cultural significance of mounds may be as well reflected in the earthen construction materials and their arrangement, as it is in the artifacts abandoned on their summits. We use geoarchaeological examples from three sites in the Mississippi River basin, Shiloh Mounds, Cahokia, and Poverty Point, to advocate a geoarchaeological approach that considers multiple scales from the regional soils and geomorphology, field observation of lithostratigraphic units, to the micro-scale identification of the mineralogy and soil development in order to decipher the source and processing of the soils and sediments. We focus on the use of five types of construction referred to here as: sod blocks, soil blocks, loaded fills, zoned fills and veneers. Also we address the selection and transportation of soils and sediments used in mound building and what these types of deposits reveal about the methods used to build mounds. These data can be used to evaluate and understand organization of labor, pace of construction, and mound appearance. We hold there is a considerable (although unquantified) difference between earth moving and mound building and that the construction of these important monuments required considerable knowledge, skill, planning, hard work, and attention to symbolic and ritual meaning.     

The radiocarbon reservoir effect: new evidence from the cemeteries of the middle and lower Dnieper basin,Ukraine

This paper presents preliminary results of new radiocarbon dating of human, faunal and fish skeletal remains from a number of the cemeteries from the Middle and Lower Dnieper Basin, Ukraine. The results appear to demonstrate the presence of a radiocarbon reservoir effect during the Neolithic–Eneolithic periods, the first time that this has been identified in this region. The data indicate that the radiocarbon reservoir effect is currently only evident during these periods, and not in the earlier Epipalaeolithic–Mesolithic periods, prompting the suggestion that the radiocarbon reservoir effect is associated with elevated fish consumption from the Neolithic period onwards.     

Rethinking transboundary waters: A critical hydropolitics of the Mekong basin

Efforts to understand the geographical and political complexities of transboundary river basins—both within national jurisdictions and at international levels—must embrace critical interdisciplinary perspectives. In this paper, we focus attention on underdeveloped aspects of transboundary water conflicts and cooperation—e.g., how ecological understandings of river basins are transformed within transboundary institutional arrangements; the way multiple actors in transboundary basins construct geographical scales; and how control over water is represented and exercised within governance and management institutions. We advance the notion of critical hydropolitics as a way of explicating these processes. We draw on a case study of conflict over and within the transboundary waters of the Mekong River basin to illustrate this approach. Our aim is to complement and extend ongoing research and policy debates concerning transboundary waters.     

The Cold War, the US Bureau of Reclamation, and the technopolitics of river basin development, 1950–1970

This paper examines the links between Cold War geopolitics and economic development to explain the relatively rapid proliferation of the concept of river basin development throughout so-called “developing areas” of Asia, the Middle East, Africa and Latin America during the latter half of the twentieth century. The research focuses on the United States Bureau of Reclamation, the most significant water resource development agency of the US government, and its engagement in what it termed “foreign activities” beginning in the aftermath of World War II. Grounded in recent work on technopolitics, the constructed scales of water resource development, and histories of the “global” Cold War, this research examines the advancement of water resource development in the Litani River basin in Lebanon—as guided by staff of the US Bureau of Reclamation—during the period from 1950 to 1970. The Bureau operated as a geopolitical agent attempting to implement a universalized model of river basin development, but encountered continuous difficulties in the form of political and biophysical contingencies. The Bureau’s efforts, centred on the basin as the most appropriate unit of development, were consistently undercut by scale-making projects related to global and regional geopolitical concerns. The research concludes that understandings of the technopolitics of development interventions would benefit from a closer engagement with recent discussions regarding the construction of spatial scale within political geography and related fields. River basin development and its material transformation of multiple locales remains one of the largely neglected, but vitally important, legacies of Cold War geopolitics.     

Dendrochronological and radiocarbon dating of subfossil wood from the Morava River basin

The paper deals with dendrochronological and radiocarbon dating of subfossil trunks found in the basin of the Morava River. The research into subfossil trunks had been conducted in the Czech Republic in the past but the research stopped in 2001. 160 records of measurements of subfossil, predominantly oak trunk samples, are preserved from that time. Three years ago the research was reopened and again the most trunks were found in the basin of the Morava River. 92 samples of oak trunks and 7 samples of other tree species (poplar, elm, maple, beech) were taken from selected sites. The samples were processed in compliance with the standard dendrochronological methodology. To date the samples, Czech, Austrian, Polish and German standard chronologies were used. In cases when the dendrochronological dating was unsuccessful, the samples were sent for radiocarbon dating. In total, 35 samples were dated, mainly by the radiocarbon method. Subfossil trunks from gravel pit Tovačov were dated and classified into 4 different periods, the oldest being from 2780–2190 BC. In Osek nad Bečvou, the samples were taken from two sites. Whereas from the 4 trunks taken in the river channel each was from a different period, the trunks from the gravel pit come from 981–1015 AD. The trunks found in the Morava River basin near Strážnice were dated to the 10^th–15^th century. In the future, we expect to extend the amount of the acquired samples with the aim to create a link to the existing standard chronology or to create a long floating average treering curve.     

Fluid systems and mineralization in the north German and Polish basin

The North European Basin hosts mineral deposits like the Kupferschiefer and the Mississippi Valley Type deposits in the Silesian sub‐basin in Poland. The basement to this basin, exposed in the Harz Mts and in the Flechtingen and Calvörde Blocks, contains Mesozoic Pb–Zn vein mineralization and barite–fluorite deposits as well as massive hematite veins in the Rotliegend volcanics. A comparison of the mineralizing models of these deposits with results from a basin‐wide petrographic, fluid inclusion and stable isotope study shows that the genesis of the mineral deposits can be explained by fluid systems that were active during different stages of basin evolution. These comprise syn‐ to post‐magmatic fluids derived from or mobilized in the course of the Rotliegend magmatism, fluids convecting in the Rotliegend units during the extensional basin subsidence in the Permo‐Triassic and originating from progressive devolatilization of the basin sequence and fluids derived from the overlying Zechstein evaporites. Deep‐reaching fault systems developing during the Cretaceous tectonic reactivation enhanced fluid percolation from the surface to the deep sections of the basin sequence. Identification and correlation of these fluids across the basin and in the mineralizations provide the base for a basin‐wide metallogenetic model.     

加大柴达木盆地生态建设和环境保护力度

柴达木盆地脆弱的生态环境是制约经济开发的重要因素之一,实施生态环境保护和绿色发展战略,是地区社会经济可持续发展的必然选择。为此,要以科学发展观为指导,不断加强对公民的生态意识教育,合理利用自然资源,建立资源节约型社会,统筹人与自然的和谐发展,加大资源和环境保护的行政管理和治理力度,使生态建设和环境保护走上法制化的轨道。     

Landscapes of death: GIS-based analyses of chullpas in the western Lake Titicaca basin

The western Lake Titicaca basin is marked by above-ground funerary towers, known as chullpas, located in a variety of geographical contexts and dating to the Late Intermediate Period, or LIP (AD 1100–1450), and Late Horizon (AD 1450–1532). Over the years, interpretations of these tombs have concentrated upon their roles as loci for ancestral veneration and their abilities to perpetuate memory, delineate social ties and territories, and demarcate access to resources. These views share the implicit or explicit assumption that these mortuary structures were intended to be highly visible. Yet this assumption has never been formally tested. By using GIS-based geospatial tools and statistical analysis, this paper investigates the extent to which chullpas surveyed in the western Lake Titicaca basin visually dominated the landscape. These tombs were not positioned in random locations; they exhibit a high degree of clustering and were built in highly visible areas that could be seen from sites of occupation and regions of economic importance such as Lake Umayo. This paper suggests that this landscape of death was deliberately constructed to have an enduring social impact.