Antarctic history: A reply to professor W. H. Hobbs

On July 25th 1983 a severe thunderstorm brought torrential rain and flooding to a small valley near Newcastleton in Roxburghshire. At one site within the valley, around 65 mm of rainfall was recorded in 75 minutes, though this was probably 2 km from the centre of the storm. The resulting peak flow was estimated at almost 170 m³s^‐1 from a drainage area of 36.9 km². Lightning killed some livestock whilst many more were drowned. The storm triggered peat slides on several hillsides and caused extensive erosion of river banks and damage to buildings and bridges. The associated high sediment load killed fish stocks in the receiving waters. The flood was a significant event in terms of its human disruption and its impact on the natural environment.     

明清时期福州西湖水环境变迁及其治理研究

明清时期,福州西湖水环境总体趋劣。明代西湖水源较为充足,水质状况良好;万历以降,受民间占垦等社会因素影响,湖域面积缩减,水质日渐趋下;清代中后期,福州城内水道淤浅,江潮渐绝,西湖水源趋向单一。明清时期西湖水环境的变动,除了受区域气候干湿变化、山地森林水土保持以及湖泊含沙量的影响之外,还与人为的水地之争密切相关。由于人地关系紧张,加之水资源权属不清、新垦湖田税赋征收模糊等,获取湖利的必然性刺激了民间占湖为地的行为。地方官府也曾采取如修闸筑坝护堤、追返侵地还湖、清理粪秽淤泥等治理措施,并取得阶段性成效,但受区域人口、土地资源与生存环境等社会经济因素的影响,西湖历经多次治理仍积弊难除。     

Carbon accumulation and C/N ratios of peat bogs in North‐West Scotland

Three different Scottish peat bogs were sampled, dated and analysed for carbon (C) and nitrogen (N) concentrations. The mean long‐term apparent rate of C accumulation (LARCA) for the three bogs is 213 g C m^～2 yr^‐1’ over the past eight to nine thousand years, comparable to estimates from other parts of the world with similar climate conditions. Within the catotelm portion of peat sequences, the LARCA is variable, ranging from 4.1 to 72.5 g C m^～2 yr^～1. Rates were highest in the early Holocene, in peat rich in woody fragments, and lowest in the mid‐Holocene during drier periods, followed by increased rates during the late Holocene. Analysis of C/N ratios shows a significant positive correlation with peat humification. This may be because past changes in bog wetness affected the C/N ratios of newly forming peat by altering rates of N mineralisation and loss before incorporation of peat into the catotelm.     

Rapid On‐site Topographic Mapping with a Handheld Laser Range Finder for a Geoarchaeological Survey in Syria

A digital elevation model and a topographic map of an archaeological site in Syria were created from a field topographic survey with a handheld laser range finder and data post‐processing using a notebook personal computer with Geographical Information System software. The method enabled rapid on‐site topographical mapping even under technical and political restrictions in the country. In an area of about 1 km², coordinates of random points on the land surface were measured, and a DEM with a 10 m interval grid was generated from the point cloud using Kriging interpolation. The DEM enables various topographic representations to be constructed, such as contour lines, cross sections and slope distribution maps. The DEM‐derived contour lines with a 1 m interval were combined with vector data showing roads and buildings to provide a topographic map. Topographic cross sections created from the DEM generally agree with sections surveyed with a hand level and a measurement tape. The obtained DEM and map are useful for preliminary field research.     

An assessment of blanket mire degradation and Peatland Gully development in the Cheviot Hills,Northumberland

This paper provides the first systematic assessment of blanket mire degradation in the east Cheviot Hills, Northumberland. The extent of erosion is mapped over a 32 km² area of peat. Erosion affects 37% of the blanket peat. Erosion forms consist of anastomosing (7%), linear (21%) and dendritic (9%) gully systems together with peat slides (<1%). Topography is the primary influence on gully system pattern. Spatial variations in gully form can be partly explained by position in the stream network (stream order) and local variations in the depth of peat. A sequential scheme of gully development is described. Gullies evolve initially through a phase of rapid downcutting to the peat base, followed by lateral erosion and gully widening becoming dominant through a process of roughly parallel wall retreat. As gully width increases re‐deposition of peat occurs and re‐vegetation occurs on the gully floor. Comparative photography reveals that gully patterns have been stable over the past 32 years and in some areas for over 70 years. It is possible that gully systems in places are in excess of 500 years old.     

Feeding Relationship: Uncovering Cosmology in Christian Women's Fellowship in Papua New Guinea

While the Christian doctrine to which Hula villagers of the south east coast of Papua New Guinea today subscribe claims that community is achieved contractually through membership in the Church, this paper suggests that, in practice, Hula sociality is shaped by other exigencies. As part of their program the members of the Iru‐ale United Church Women's Fellowship undertake the incorporation of certain outsiders (in this case the ethnographer) through the ceremonial presentation of food and the act of feeding. A phenomenology of this imperative reveals important connections to pre‐Christian mythology and cosmology. Incorporation seen in this context situates the ‘feeding relationship’ at the core of a Hula ontology in which body and food are consubstantial. The manipulation of food as body is shown to play a determining role in the constitution of various modes of existence; human and non‐human, male and female, the living and the non‐living. The feeding relationship thus facilitates continuity between past and present practices and suggests that the Hula have assimilated the introduced religion into their lifeworld largely on their own terms.     

PRINCIPAL TRENDS AND PROSPECTS OF THE USE OF WATER RESOURCES IN THE USSR

The increasing demand on water in the Soviet Union and the problem of assuring water quality require the construction of long-term water-management balances by drainage basins. These balances, based on predicted demand and water availability, would suggest the need for water-management projects within basins and interbasin transfers. Water needs would be evaluated both in terms of water requirements by categories of users and in terms of water quality. The most crucial regional problems involve the increasing shortage of water in Central Asia (with the prospect of interbasin transfer from Siberia) and in southern regions of the European USSR (with the problem of diverting water southward from the northern runoff slope). The Caspian Sea is expected to require a supplementary inflow of 80 to 100 cubic kilometers a year by the end of the century if the decline of its waterlevel is to be arrested. But southward diversion of northern waters is not expected to add more than 50 to 70 km³ at best, with a possible saving of an additional 10 to 20 km³ through decline of evaporation from a reduced Caspian Sea surface. The preservation of conditions in the Sea of Azov, the Aral Sea and Lake Balkhash pose additional water problems. [The senior author died in October, 1974].     

Lake Nuga Nuga: a Levee‐dammed Lake in Central Queensland,Australia

Lake Nuga Nuga is a levee‐dammed lake in the dry sub‐humid tropics of the Fitzroy Basin in Central Queensland, Australia, that has expanded significantly since it was first mapped in 1866. ²¹⁰Pb dating of a sediment core from the lake indicates that the rate of sedimentation has been constant for the past 67 years at 3 mm yr^?1 despite widespread clearing and land use intensification in the catchment during that time. Pollen analysis confirms this and shows that there was little change in vegetation during the early settlement period (1863–1962), but the intensification of land use that started in the early 1960s brought about a dramatic change in the vegetation communities. This study demonstrates that while sediment production may be significantly impacted by land‐use activities, sediment delivery is primarily controlled by topography.     

The boat grave studies of Sutton Hoo and Vendel ‐ A Palaeoenvironmental study

This study is part of the project ‘Vegetational development and land use during the pre‐Viking period. A comparative study of environmental history in northern Uppland, Sweden, and East Anglia, England’. The main aim of the project is to reconstruct the palaeoenvironments within the catchment areas of Lake Vendelsjön, northern Uppland, and the river Deben, East Anglia. The project employs a variety of palaeoecological methods such as sedimentation processes and rates, erosion levels, changes in sea level and climatic influences, the effects of land uplift and changes in land use. The time period covered by the project is the last 3000 years.     

THE PRESENT STAGE IN THE EVOLUTION OF THE SARYKAMYSH DEPRESSION

The Sarykamysh depression of Soviet Central Asia, southwest of the Aral Sea, has begun to fill with water since around 1960 after having lain dry for 350 years. As of 1976, the lake, fed mainly by irrigation drainage water from the nearby Khorezm (Khiva) oasis, had grown to 2,000 km², with a depth of at least 40 m. The depression was receiving 4 to 4.5 km³ of water a year and continued to fill. While the appearance of such a large body of water in the desert would appear in itself to be a positive development, the question is raised whether the water would not be put to better use by being directed toward the Aral Sea.     

Rugged Plateaus and Extensive Floodplains — Modelling Landform Evolution in a Northern Australian Catchment

Medium to large natural catchments are often more spatially heterogeneous than small catchments or single landforms. Attempting to model landform evolution of large areas is consequently more complex. This paper demonstrates that modelling landform evolution in medium to large catchments can be improved by calibrating the model to smaller, more geomorphologically homogenous sub‐catchments. The paper investigates landform evolution in the Ngarradj catchment in the Northern Territory of Australia (a medium scale catchment of approximately 67 km²). The catchment is complex and contains two distinct landform regions; an upland plateau region with highly dissected sandstone and shallow, sandy soils, and a lowlands region with gentle, wooded slopes and floodplains with deep, sandy soils. The SIBERIA landform evolution model is calibrated and applied to the Ngarradj catchment. The complexity of the Ngarradj catchment is incorporated into the modelling by dividing the catchment into three sub‐catchments (Swift Creek (SC), Upper Main (UM) and East Tributary (ET)) which are relatively homogeneous and for which hydrology and sediment transport data are available. A discharge‐area relationship and long‐term, sediment loss rates for the catchment are derived based on an annual series flood frequency analysis of a 20 year runoff record predicted in a previous study. Sediment transport modelling incorporates both suspended and bedload sediment loss. The denudation rates derived using these data are 37, 63 and 77 mm kyr^?1 for the SC, UM and ET sub‐catchments, respectively. Model predictions indicate that the UM sub‐catchment will have the greatest mean erosion. This is balanced by the large amount of deposition that will occur in the upper Ngarradj valley of the UM sub‐catchment. Further deposition occurs on the floodplain of Ngarradj, with the area between the SC and ET/UM (up‐stream) sub‐catchments experiencing a small net accretion of sediment (15 mm kyr^?1).     

Field survey and excavation of two linear wooden features at Hooper’s Ground,Westhay Heath,Somerset, 1992

Abstract

While much is known of prehistoric exploitation of the Somerset Levels and Moors,¹ extensive peat extraction across the Moors since the early post-medieval period has effectively removed most of the historic peats and consequently much the archaeology of the later periods. It is now believed that peat was continuing to form in the area until the end of the first millennium AD,² and though little is known, medieval and post-medieval features will invariably have cut into these and earlier peats. B. Coles and J. Coles, Sweet Track to Glastonbury (London, 1986). M. Cox, ‘Archaeology in the Somerset Levels and Moors 1992’ in M. Bell (ed.), Severn Estuary Levels Research Committee Annual Report 1992, 63-68.

In 1991, two similar linear brushwood features were noted, during routine archaeological monitoring of areas subject to peat extraction, in an area known as ‘Hooper’s Ground’ between the villages of Westhay and Burtle, some three miles west of Glastonbury. Revealed as a consequence of peat extraction, a short programme of survey and excavation undertaken in 1992 demonstrated that they were contemporary structures dating from around 1700. Their function is presently unknown, although it is considered that they may reflect land restoration for agricultural use post-dating earlier efforts at peat extraction.     

Effective gas permeability of Tight Gas Sandstones as a function of capillary pressure – a non‐steady‐state approach

Single‐ and two‐phase (gas/water) fluid transport in tight sandstones has been studied in a series of permeability tests on core plugs of nine tight sandstones of the southern North Sea. Absolute (Klinkenberg‐corrected) gas permeability coefficients (k_gas__inf) ranged between 3.8 × 10^?16 and 6.2 × 10^?19 m² and decreased with increasing confining pressure (10–30 MPa) by a factor 3–5. Klinkenberg‐corrected (intrinsic) gas permeability coefficients were consistently higher by factors from 1.4 to 10 than permeability coefficients determined with water. Non‐steady‐state two‐phase (He/water) flow experiments conducted up to differential pressures of 10 MPa document the dynamically changing conductivity for the gas phase, which is primarily capillary‐controlled (drainage and imbibition). Effective gas permeability coefficients in the two‐phase flow tests ranged between 1.1 × 10^?17 and 2.5 × 10^?22 m², corresponding to relative gas permeabilities of 0.03% and 10%. In the early phase of the nonstationary flow regime (before establishment of steady‐state conditions), they may be substantially (>50%) lower. Effective gas permeability measurements are affected by the following factors: (i) Capillary‐controlled drainage/imbibition, (ii) viscous–dynamic effects (iii) and slip flow.     

Hillslope Runoff and Soil Erosion Following Reforestation in the Copper Basin,Tennessee, USA

The landscape of the 130 km² Copper Basin, in the southeastern USA, became extremely degraded during more than a century of logging, mining, acidification, grazing, and fire. In the twentieth century, the Copper Basin became the focus of a series of reforestation programs and is now largely tree‐covered again. To investigate the effects of over 50 years of reforestation efforts, we developed a space‐for‐time substitution and conducted rainfall simulation experiments in ‘forest’ patches of various ages, at sites remaining unvegetated, and at forested reference sites outside the basin. At 59 sites, we monitored surface runoff and sediment detachment rates during 30‐minute rainfall simulation experiments; and at 54 of those sites, we determined soil organic matter content. Then, we measured litter and observed soils at 25 of the sites, and measured soil respiration at a site in each age zone. The results demonstrate that soil erosion by sediment detachment decreases within a decade following reforestation. Recently reforested sites have soils with significantly less organic matter and have higher runoff rates than forests more than 50 years old. The long‐term persistence of low infiltration rates suggests that, at sites where the A and B soil horizons and the biological health of the soil have been lost, restoration of the hydrologic function of a landscape by reforestation may require centuries.     

Dramatizing sovereignty: the construction of territorial dispute in the Israeli–Egyptian border at Taba

Inter-state territorial conflicts are highly instructive of the complex nature of the concept of sovereignty and its modes of social construction in a world where the politicization of territory has become a highly institutionalized practice. However, more often than not, these conflicts revolve around tiny pieces of land lacking any ostensible value for both partners, thus calling into question the applicability of rational action assumptions in international relations. The dispute between Egypt and Israel all through the eighties over 1 km² of desert called Taba, just after both states signed a peace agreement and Israel restored to Egyptian sovereignty over 60,000 km² of land, is such an example. Drawing on constructivist and neo-institutionalist approaches that treat sovereignty as a social construct, we argue through the case of Taba that the dramatization of sovereignty and the status politics that motivate it, carried out by state and non-state actors in three different but interrelated arenas: the domestic, the regional and the international, are decisive factors in the constitution of sovereignty.     

The Indian State in a Liberalizing Landscape

There has been much discussion recently on the ‘great Indian land grab’, that is, the acquisition of productive land by the government, and the handing over of this land to large‐scale industry. What do these ongoing land transfers tell us about the nature of the state? This article builds a picture of the state in a liberalizing landscape based on empirical evidence. It outlines the role of the state in Kutch during a transfer of 30 km² of forest and coastal land to a cement manufacturing and exporting operation ‘Karkhana Ltd.’ (pseudonym). Karkhana's experience does not evince a state in withdrawal. Nor do we witness a regulatory state that watches a changing economy from the legal and coercive sidelines. Instead, the case study is able to reinforce heterodox perspectives that place the state at the centre of India's new economy as a close ally of big capital. Taking these views forward, the author suggests that the state's role in this alliance is that of a normative legitimator of liberalization, a buffer in the contentious politics of land, and an institutional promoter of and manoeuvrer through the new land regime. A multifaceted state is indispensable to India's liberalizing landscape.     

Erosion and Nutrient Loss on Sloping Land under Intense Cultivation in Southern Vietnam

To help improve the well‐being of the local people, a joint Vietnamese‐UK team set out to establish a way of estimating soil and nutrient losses under different land management scenarios, using field data extrapolated through remote sensing and GIS, to obtain catchment‐wide estimates of the impact of land cover change. Immigration from remote provinces to the Dong Phu District of Binh Phuóc Province, about 120 km north of Ho Chi Minh City, has led to disruption of soil surface stability on easily eroded clayey sandstones, creating rapid nutrient depletion that affects crop yields and siltation in the channel of the Rach Rat river downstream. The poor farmers of the areas see crop yields drop dramatically after two or three years of cultivation due to the fertility decline. Soil loss varies dramatically between wet season and dry season and with ground cover. Erosion bridge measurements showed a mean loss of 85.2 t ha^?1 y^?1 under cassava saplings with cashew nuts, 43.3 t ha^?1 y^?1 on uncultivated land and 41.7 t ha^?1 y^?1 under mature cassava. The rates of erosion were higher than those reported in many other parts of Vietnam, reflecting the high erodibility of the friable sandy soils on the steep side‐slopes of the Rach Rat catchment. However, although the actual measurements provide better soil loss data than estimates based on the parameters of soil loss equations, a large number of measurement sites is needed to provide adequate coverage of the crop and slope combinations in this dissected terrain for good prediction using GIS and remote sensing.     

近代东太湖的围垦与治理(1890—1937年)——以吴江地区为中心

东太湖是太湖主要出水区,生态环境敏感。光绪十六年河南客民迁入,吴江东太湖兴起围垦潮。此后到抗战前,对其治理政策经历了从光绪中后期招垦弛禁,到1914年禁垦、停补荡粮,再到1925年有限放垦的变化过程。这看似是从以财政考虑为主,到重视水利等问题,再到注重合理开发的变迁过程。然而,1914年后,由于财政需求以及治湖经费不得不依赖湖田放领的现实,官方不仅未能限制和引导围垦,设局放领和下调湖田领价,反而推动围垦无序发展,使水利状况日趋恶化。1935年大规模私围后,官方不得不拆围以避免极端后果,并制定善后方案。总之,近代转型过程中,技术和理念有所进步,却未必能真正推进环境治理,财政能力是影响治理落实的重要因素。     

Prior to Peat: Assessing the Hiatus between Mesolithic Activity and Peat Inception on the Southern Pennine Moors

Palaeoecological investigation of soils exposed by eroding peat haggs on the moors above Tintwistle (Derbyshire) suggests that Mesolithic impact on upland soils between c. 360–500 m OD was not as dramatic, nor as long-lasting, as has sometimes been suggested. Despite evident erosion prior to peat inception, patterning has survived within Mesolithic scatters of artefacts. Neolithic activity is attested by both artefacts and charcoal-rich horizons suggesting intermittent burning of vegetation. Peat finally blanketed these uplands around the start of the second millennium cal. BC.

These results demonstrate radically different scenarios at different altitudes within relatively small distances across the southern Pennines, shifting our appreciation of the chronology of changes in vegetation and erosion, as well as contributing to wider debate on the causes of moorland development, which can inform future land management.