Artykuły w czasopismach na temat „Fill-cut terrace”

AbstractFour late-Quaternary alluvial fills and terraces are recognized in Wolf Creek basin, a small (163 km2) drainage in the Kansas River system of the central Great Plains. Two terraces were created during the late Pleistocene: the T-4 is a fill-top terrace underlain by sand and gravel fill (Fill I), and the T-3 is a strath terrace cut on the Cretaceous Dakota Sandstone. Both Fill II (early Holocene) and Fill III (late Holocene) are exposed beneath the T-2, a Holocene fill-top terrace. The T-1 complex, consisting of one cut and three fill-top terraces, is underlain by Fills III and IV. A poorly developed floodplain (T-0) has formed within the past 1000 yr. As valleys in Wolf Creek basin filled during the early Holocene, an interval of soil formation occurred about 6800 yr B.P. Early Holocene fill has been found only in the basin's upper reaches, indicating that extensive erosion during the middle Holocene removed most early-Holocene fill from the middle and lower reaches of the basin. Valley filling between 5000 and 1000 yr B.P. was interrupted by soil formation about 1800, 1500, and 1200 yr B.P. As much as 6 m of entrenchment has occurred in the past 1000 yr. Holocene events in Wolf Creek basin correlate well with those in other localities in the central Great Plains, indicating that widespread changes in climate, along with adjustments driven by complex response, influenced fluvial activity.

Abstract. Cut–fill terraces occur throughout the western Andes, where they have been associated with pluvial episodes on the Altiplano. The mechanism relating increased rainfall to sedimentation is, however, not well understood. Here, we apply a hillslope sediment model and reported cosmogenic nuclide concentrations in terraces to examine terrace formation in semi-arid escarpment environments. We focus on the Pisco river system in western Peru in order to determine probable hillslope processes and sediment transport conditions during phases of terrace formation. Specifically, we model steady-state and transient hillslope responses to increased precipitation rates. The measured terrace distribution and sediment agree with the transient predictions, suggesting strong climatic control on the cut–fill sequences in western Peru primarily through large variations in sediment load. Our model suggests that the ultimate control for these terraces is the availability of sediment on the hillslopes, with hillslope stripping supplying large sediment loads early in wet periods. At the Pisco river, this is manifest as an approximately 4-fold increase in erosion rates during pluvial periods. We suggest that this mechanism may also control terrace occurrence other semi-arid escarpment settings.

Abstract. Cut-fill terraces occur throughout the western Andes where they have been associated with pluvial episodes on the Altiplano. The mechanism relating increased rainfall to sedimentation is however not well understood. Here, we apply a hillslope sediment model and reported cosmogenic nuclide concentrations in terraces to examine terrace formation in semi-arid escarpment environments. We focus on the Rio Pisco system in western Peru in order to determine probable hillslope processes and sediment transport conditions during phases of terrace formation. Specifically, we model steady state and transient hillslope responses to increased precipitation rates. The measured terrace distribution and reconstructed sediment loads measured for the Rio Pisco agree with the transient model predictions, suggesting strong climatic control on the cut-fill sequences in western Peru primarily through large variations in sediment load. Our model suggests that the ultimate control for these terraces is the availability of sediment on the hillslopes with hillslope stripping supplying large sediment loads early in wet periods. At the Rio Pisco, this is manifest as an approximately 4 × increase in erosion rates during pluvial periods. We suggest that this mechanism may also control terrace occurrence in other semi-arid escarpment settings.

Fluvial geomorphology and stratigraphy often reflect past environmental and climate conditions. This study examines the response of Bull Creek, a small ephemeral creek in the Oklahoma panhandle, to environmental conditions through the late Pleistocene and Holocene. Fluvial terraces were mapped and their stratigraphy and sedimentology documented throughout the course of the main valley. Based on their elevations, terraces were broadly grouped into a late-Pleistocene fill terrace (T3) and two Holocene fill-cut terrace sets (T2 and T1). Terrace systems are marked by similar stratigraphies recording the general environmental conditions of the time. Sedimentary sequences preserved in terrace fills record the transition from a perennial fluvial system during the late glacial period and the Younger Dryas to a semiarid environment dominated by loess accumulation and punctuated by flood events during the middle to late Holocene. The highest rates of aeolian accumulation within the valley occurred during the early to middle Holocene. Our data provide significant new information regarding the late-Pleistocene and Holocene environmental history for this region, located between the well-studied Southern and Central High Plains of North America.

AbstractWe study the aggradation and incision of the Alaknanda River Valley during the late Pleistocene and Holocene. The morphostratigraphy in the river valley at Deoprayag shows the active riverbed, a cut terrace, and a fill terrace. The sedimentary fabric of the fill terrace comprises four lithofacies representing 1) riverbed accretion, 2) locally derived debris fan, 3) the deposits of waning floods and 4) palaeoflood records. The sedimentation style, coupled with geochemical analysis and Optically Stimulated Luminescence (OSL) dating, indicate that this terrace formed in a drier climate and the river valley aggraded in two phases during 21–18 ka and 13–9 ka. During these periods, sediment supply was relatively higher. Incision began after 10 ka in response to a strengthened monsoon and aided by increase of the tectonic gradient. The cut terrace formed at ~ 5 ka during a phase of stable climate and tectonic quiescence. The palaeoflood records suggest wetter climate 200–300 yr ago when the floods originated in the upper catchment of the Higher Himalaya and in the relatively drier climate ~ 1.2 ka when locally derived sediments from the Lesser Himalaya dominated flood deposits. Maximum and minimum limits of bedrock incision rate at Deoprayag are 2.3 mm/a and 1.4 mm/a.

The morphology of the Québec region and the lower St. Lawrence valley is reappraised in this article divided in three parts. The physical landscape is described in part I ; the structural conditions are examined in part II and the morphological problems are presented in part III. The relief is the result of a succession of glacial episodes and submersion and emersion episodes which followed glaciation. The over deepening of the Limoilou depression and the opening of Calvaire lake and Cap Rouge depressions are the results of the glacier. To the submerged phase correspond the alluvial fill, especially thick in the Limoilou depression, and during the emersion phase, the St. Lawrence cut in soft schists the Ancienne Lorette and the lower terrace which would have been shaped after the over deepening of the Limoilou depression.

Upper Paleozoic to Lower Jurassic oceanic rocks of the Cache Creek Terrane near Fort St. James, in central British Columbia, form a stack of thrust sheets cut by steeply dipping strike-slip faults. Paleontologically dated upper Paleozoic strata include bioclastic shallow-water limestone and ribbon chert. Isotopically dated Permian rocks consist of tonalite sills and stocks and rhyolite flows intercalated with basalt flows. Paleontologically dated lower Mesozoic rocks include greywacke, sandstone, siltstone, argillite, ribbon chert, conglomerate, limestone, and basalt tuff. Trembleur Ultramafite unit of the Cache Creek Complex, in places part of an ophiolite suite, forms thrust sheets and klippen that overlie lower Mesozoic sedimentary rocks. Sedimentological, lithochemical, paleontological, petrological, and textural comparisons with other areas and established models demonstrate that Cache Creek Terrane is an accretionary complex, a structurally stacked assemblage of rocks that originated in diverse and disparate oceanic paleoenvironments. These environments include spreading ridge, oceanic plateau, atoll, trench fill, and possibly arc. Internal imbrication of the terrane is as young as Early Jurassic, as determined from fossil evidence, and the minimum age of obduction of the thrust stack westward onto Stikine Terrane is Middle Jurassic, as determined from dating of a crosscutting pluton. Triassic blueschist and eclogite of Cache Creek Terrane are interpreted to have been primarily uplifted to upper crustal levels during Triassic subduction. Cache Creek Terrane, as a remnant of that subduction process, and caught in the collision between Stikine and Quesnel terranes, marks the position of a lithosphere-scale suture zone, the Pinchi Suture.

AbstractNumerical dating and geomorphic studies on alluvial sediment were undertaken in the uppermost reaches of the Dunajec River catchment in the northern foreland of the Tatra Mountains of Poland. Successions of alluvial deposits in river terraces and alluvial fans are common in this region. In particular, alluvial fans deposited a thick succession of sediment in the intramontane Orawa–Nowy Targ Depression, and terraces are preserved as two cut-and-fill and six strath terraces along the uplifting sections of river courses. We identify several alluviation phases within the alluvial successions that occurred since Marine Oxygen Isotope Stage 6. These sediments show that deposition largely occurred under temperate-climate conditions. This is in spite of a potential strong impact from headwater glaciers under cold-climate conditions. Glacially produced sediments were largely stored within frontal moraines and proglacial floodplains. These glaciogenic sediments were eroded and resedimented during glacier retreat. We therefore conclude that “warm” alluviation is the dominant process forming alluvial successions in this region.

AbstractThe valley floor of a 33.9 km2 watershed in western Colorado experienced gradual sedimentation from before ∼ 6765 to ∼ 500 cal yr BP followed by deep incision, renewed aggradation, and secondary incision. In contrast, at least four terraces and widespread cut-and-fill architecture in the valley floor downstream indicate multiple episodes of incision and deposition occurred during the same time interval. The upper valley fill history is atypical compared to other drainages in the Colorado Plateau.One possible reason for these differences is that a bedrock canyon between the upper and lower valley prevented headward erosion from reaching the upper valley fill. Another possibility is that widespread, sand-rich, clay-poor lithologies in the upper drainage limited surface runoff and generally favored alluviation, whereas more clay-rich lithologies in the lower drainage resulted in increased surface runoff and more frequent incision. Twenty-two dates from valley fill charcoal indicate an approximate forest fire recurrence interval of several hundred years, similar to that from other studies in juniper–piñon woodlands. Results show that closely spaced vertical sampling of alluvium in headwater valleys where linkages between hillslope processes and fluvial activity are relatively direct can provide insight about the role of fires in alluvial chronologies of semi-arid watersheds.

There are few studies conducted on the short-term effects of land leveling on soil water holding capacity. The objectives of this study were to analyze the short-term effects of land leveling on the magnitudes, variances, spatial variability, and distributions of surface (0–20 cm) and subsurface (20–40 cm) soil properties of bulk density, field capacity, permanent wilting point, water holding capacity and particle size fractions. The study was conducted in a 1.2 ha field with clay loam soil located on the low terraces of Yesilirmak River, Tokat, Turkey. According to the pairedt-test results, water holding capacity, and bulk density significantly increased, while permanent wilting point (P ≤ 0.001) and field capacity (P ≤ 0.05) significantly decreased for surface soil due to land leveling. The reasons for the increases in WHC values in both cut and fill areas (29%, and 12%, resp.) of surface soil are look like the much more decreases in PWP values than those of FC values and the increases in BD values. The moderate positive linear relationship between the surface soil clay contents and cut depths through cut areas (r= 0.64) was also determined in this study.

Abstract. Expanding systems of mountain roads in developing countries have significantly increased the risk of landslides and sedimentation, and have created vulnerabilities for residents and aquatic resources. We measured landslide erosion along seven road segments in steep terrain in the upper Salween River basin, Yunnan, China and estimated sediment delivery to channels. Landslide erosion rates along the roads ranged from 2780 to 48 235 Mg ha−1 yr−1, the upper end of this range being the highest rate ever reported along mountain roads. The two roads with the highest landslide erosion (FG1 = 12 966 Mg ha−1 yr−1; DXD = 48 235 Mg ha−1 yr−1) had some of the highest sediment delivery rates to channels (about 80 and 86%, respectively). Overall, 3 times more landslides occurred along cut slopes compared to fill slopes, but fill slope failures had a combined mass > 1.3 times that of cut slope failures. Many small landslides occurred along road cuts, but these were often trapped on the road surface. Given the magnitude of the landslide problem and the lack of attention to this issue, a more sustainable approach for mountain road development is outlined based on an analysis of landslide susceptibility and how thresholds for landslide trigger mechanisms would be modified by road location and different construction techniques.

AbstractAutomating earth-moving tasks has the potential to resolve labour-shortage, allow for unseen designs and foster sustainability through using on-site materials. In this interdisciplinary project involving robotics and landscape architecture, we combine our previous work on autonomous excavation of free-form shapes, dynamic landscape design and terrain modelling tools into a robotic landscape system. It tightly connects survey, design and fabrication to exchange information in real-time during fabrication. We purposely built a LiDAR survey drone for tight integration. The design environment contains terrain modelling tools to balance cut and fill volumes for material-neutral, on-site construction. Its parametric nature allows it to adapt the geometry to changing site conditions during fabrication. Our autonomous walking excavator is used to create these free-form shapes in natural granular material. We propose an excavation planner for free-form embankments that computes the next excavation location and subsequently the location where the excavated soil should be dumped. This robotic excavation system achieves the world’s first autonomous completion of free-form embankments with high accuracy. A $$20\hbox { m}$$ 20 m long S-shaped and a two-faced embankment with a corner with roughly 0.03–0.05 m average error were created.

Earthmoving operations represent a sizeable percentage of highway construction costs. Accurate estimation of cut and fill quantities, as well as haul distances, are thus essential for developing realistic schedules and reliable cost estimates for highway construction projects. This paper presents a model designed to aid highway construction personnel in optimizing earthmoving operations by developing realistic mass haul diagrams. The model automates data acquisition and accounts for the presence of different soil strata and natural and (or) man-made obstructions affecting earthmoving plans. Geographic information systems (GIS) are employed to generate three-dimensional digital terrain models of the topography and soil profiles. The model is supported by a relational database for soil data and has been implemented in a prototype software developed in ArcView® environment. It provides a user-friendly interface to facilitate data entry and efficient reporting capabilities. The model has flexible input and output formats designed to facilitate data sharing with a number of commercially available software systems. A numerical example is presented to demonstrate the features of the developed model.Key words: data acquisition, geographic information systems, quantity estimating, earthwork optimization.

Unmanned Aerial Vehicle (UAV) systems, sensors, and photogrammetric processing techniques have enabled timely and highly detailed three-dimensional surface reconstructions at a scale that bridges the gap between conventional remote-sensing and field-scale observations. In this work 29 rotary and fixed-wing UAV surveys were conducted during multiple field campaigns, totaling 47 flights and over 14.3 km2, to document permafrost thaw subsidence impacts on or close to road infrastructure in the Northwest Territories, Canada. This paper provides four case studies: (1) terrain models and orthomosaic time series revealed the morphology and daily to annual dynamics of thaw-driven mass wasting phenomenon (retrogressive thaw slumps; RTS). Scar zone cut volume estimates ranged between 3.2 × 103 and 5.9 × 106 m3. The annual net erosion of RTS surveyed ranged between 0.35 × 103 and 0.39 × 106 m3. The largest RTS produced a long debris tongue with an estimated volume of 1.9 × 106 m3. Downslope transport of scar zone and embankment fill materials was visualized using flow vectors, while thermal imaging revealed areas of exposed ground ice and mobile lobes of saturated, thawed materials. (2) Stratigraphic models were developed for RTS headwalls, delineating ground-ice bodies and stratigraphic unconformities. (3) In poorly drained areas along road embankments, UAV surveys detected seasonal terrain uplift and settlement of up to 0.5 m (>1700 m2 in extent) as a result of injection ice development. (4) Time series of terrain models highlighted the thaw-driven evolution of a borrow pit (6.4 × 105 m3 cut volume) constructed in permafrost terrain, whereby fluvial and thaw-driven sediment transfer (1.1 and 3.9 × 103 m3 a−1 respectively) was observed and whereby annual slope profile reconfiguration was monitored to gain management insights concerning site stabilization. Elevation model vertical accuracies were also assessed as part of the case studies and ranged between 0.02 and 0.13 m Root Mean Square Error, whereby photogrammetric models processed with Post-processed Kinematic image solutions achieved similar accuracies without ground control points over much larger and complex areas than previously reported. The high resolution of UAV surveys, and the capacity to derive quantitative time series provides novel insights into permafrost processes that are otherwise challenging to study. The timely emergence of these tools bridges field-based research and applied studies with broad-scale remote-sensing approaches during a period when climate change is transforming permafrost environments.

The integration of geomorphic mapping, soil stratigraphy, and radiocarbon dating of alluvial deposits offers insight to the timing, magnitude, and paleoclimatic context of Holocene fan sedimentation near Yuma, Arizona. Mapping of 3400 km2 indicates about 10% of the area aggraded in the late Holocene and formed regionally extensive alluvial fan and alluvial plain cut-and-fill terraces. Fan deposits have weakly developed gravelly soils and yielded a date of 3200–2950 cal yr BP from carbonized wood. Alluvial plain deposits have weakly developed buried sandy soils and provided a date of 2460–2300 cal yr BP from a terrestrial snail shell. Precipitation records were analyzed to form historical analogues to the late Holocene aggradation and to consider the role of climatic variability and extreme hydrologic events as drivers of the sedimentation. The historical precipitation record indicates numerous above-average events correlated to the Southern Oscillation Index (SOI) in the region, but lacks any significant reactivation of alluvial fan surfaces. The timing of aggradation from 3200 to 2300 cal yr BP correlates well with other paleoclimatic proxy records in the southwestern U.S. and eastern Pacific region, which indicate an intensification of the El Niño-Southern Oscillation (ENSO) climatic pattern and rapid climate change during this period.

ABSTRACT Thick Quaternary sediments at Quesnel, British Columbia, provide a record of the late Quaternary history of an area near the centre of the former Cordilieran Ice Sheet. These sediments, in part, fill stream valleys that were cut sometime prior to the Late Wisconsinan Fraser Glaciation. Of special note are (1) fluvial or glaciofluvial sand and gravel deposited by aggrading streams, perhaps in part during early Fraser time; (2) thick glaciolacustrine mud, sand, and diamicton laid down later as glaciers advanced across central British Columbia; and (3) glaciolacustrine sediments similar to (2), but deposited in an ice-dammed lake at the end of the Fraser Glaciation. The stratigraphy is punctuated by colluvial deposits that are products of landslides from valley walls at various times during the late Quaternary; this process continues to the present. During the Fraser Glaciation, glaciers from the Coast and Cariboo Mountains coalesced and flowed north over central British Columbia. Fraser Glaciation advance sediments and older Pleistocene deposits were partially removed by this ice sheet and the eroded remnants mantled with till. At the end of this glaciation, the Cordilieran Ice Sheet downwasted and receded southward along an irregular front across the study area. Large amounts of sediment were deposited in glacial lakes dammed by the southward-retreating ice. With complete déglaciation of the interior, glacial lakes drained and the present drainage system was established. At first, valleys were partially aggraded with sand and gravel, but later, streams dissected valley fills to produce a series of terraces at successively lower levels.

Spatial data is a very important role in emergency command and disaster management, before, during or post disasters. When a disaster occurs, the currently geospatial information is very needed: where the center of the disaster, the area affected, the volumetric of the landslide, what facilities are damaged, and determine the location of temporary shelters. This study examines and analyze the landslide in Banjarnegara 2014 before and after the landslide using Peta Rupa Bumi Indonesia (RBI) and the UAV Aerial Photos (Unmanned Aerial Vehicle). Data before the landslide obtained from RBI, while data after landslide obtained by performing aerial photography using fixed-wing UAV in December 2014 and August 2015. These aerial photos processing with photogrammetry to produce digital orthophoto and DEM (Digital Elevation Model). Orthophoto and DEM data is used to perform geospatial analysis in both 2D and 3D. 3D analysis obtained from the extraction of DEM elevation map data values appearance of the earth (RBI) and the UAV Aerial Photo. Analysis was conducted on the four components: contouring, terrain profile/cross section, slope/gradient, and volumetric (cut and fill). Readiness management of geospatial data and information is necessary to minimize losses and speed up the process of rehabilitation and reconstruction in the areas affected by the disaster. With this spatial analysis, the estimated of volume of landslides, mapping the facility affected, and the manufacture of the soil profile (high landslide, landslide affected area) can be performed quickly and accurately.

Abstract The article characterises Late Glacial and Holocene deposits and provides a morphometric analysis of erosional and denudation valleys in the slope and terraces of the Drwęca Valley near Jajkowo village, a few kilometres east of Brodnica. A detailed field mapping was used to identify in detail two such forms within the western slope of the Drwęca Valley. Based on the results, it was found that the longitudinal profiles of these forms are not aligned (with an inclination of approximately 4˚). The slopes of valley I are asymmetrical, with the southern slope being milder than the northern exposure, which is not the case with form II. Form I is narrower and has a V-shaped cross profile, while II is wider and has a trough-shaped profile cross profile. The side valleys were initially cut by the flow of what were most probably meltwaters and precipitation water from the moraine plateau, then the erosion stopped and the valleys gradually filled and widened mainly as a result of rinsing and mass movements, which may have been increased by man. Currently, forestry use is significantly reducing the activity of slope processes and rinsing. The sediments that fill the bottoms of these forms are usually consist of silt or sandy lithofacies with massive, streaky or deformation horizons. They are characterised by a significant enrichment in organic matter which is typical for colluvial deposits of young glacial areas. The relatively high pH values result from the investigated erosional forms intersecting into sediments rich in calcium carbonate. Moreover, groundwater flowing from the moraine plateau may also be the source of basic components.

Today, differential geographical position system and total station devices are improving the accuracy of positioning information, but in critical locations such as steep slopes and closed canopy cover, the device accuracy is limited. Moreover, field surveying in this technique is time-consuming and expensive. For this reason, remote sensing technique such as light detection and ranging (LiDAR) laser scanner should be used in field measurements. The objective of this study was to evaluate and compare precision and time expenditure of total station and airborne LiDAR in producing horizontal and vertical alignments and estimating earthwork volume of two proposed forest roads in a deciduous forest of Iran. To investigate this task, the geographical position of proposed forest roads were detected by differential geographical position system and then marked on land. Mentioned roads were taken again with Leica Total Station (LTS) on control points with same 5 m intervals from start point. Recent data served as a reference value for comparison with LiDAR measurements. The data were processed in Civil 3D, Fusion and Leica geo office software. Results showed that in comparison to field-surveyed routes by LTS, the LiDAR-derived routes exhibited a horizontal accuracy of 0.23 and 0.47 m and vertical accuracy of 0.31 and 0.66 m for road 1 and road 2, respectively. The LiDAR-derived sections every 1 m exhibited cut and fill accuracy of 2.39 and 3.18 m³ for road 1 and 2.98 and 5.60 m³ road 2, respectively. In this study, it was proved that the road project can be prepared faster by LiDAR than that of LTS. Therefore, high accuracy of road projection by LiDAR is useful for terrain analysis without the need for field reconnaissance.

River aggradation or incision at different spatial-temporal scales are governed by tectonics, climate change, and surface processes which all adjust the ratio of sediment load to transport capacity of a channel. But how the river responds to differential tectonic and extreme climate events in a catchment is still poorly understood. Here, we address this issue by reconstructing the distribution, ages, and sedimentary process of fluvial terraces in a tectonically active area and monsoonal environment in the headwaters of the Yangtze River in the eastern Tibetan Plateau, China. Field observations, topographic analyses, and optically stimulated luminescence dating reveal a remarkable fluvial aggradation, followed by terrace formations at elevations of 55−62 m (T7), 42−46 m (T6), 38 m (T5), 22−36 m (T4), 18 m (T3), 12−16 m (T2), and 2−6 m (T1) above the present floodplain. Gravelly fluvial accumulation more than 62 m thick has been dated prior to 24−19 ka. It is regarded as a response to cold climate during the last glacial maximum. Subsequently, the strong monsoon precipitation contributed to cycles of rapid incision and lateral erosion, expressed as cut-in-fill terraces. The correlation of terraces suggests that specific tectonic activity controls the spatial scale and geomorphic characteristics of the terraces, while climate fluctuations determine the valley filling, river incision and terrace formation. Debris and colluvial sediments are frequently interbedded in fluvial sediment sequences, illustrating the episodic, short-timescale blocking of the channel ca. 20 ka. This indicates the potential impact of extreme events on geomorphic evolution in rugged terrain.

Phase III data recovery investigations at one historic and three prehistoric sites, augmented by additional survey and off-site geological investigations, were conducted at Lake Alan Henry (formerly Justiceburg Reservoir) on the Double Mountain Fork of the Brazos River in Garza and Kent counties, Texas, during the fall and winter of 1990-1991. Descriptive data from this first of three field seasons of data recovery are presented here in anticipation of a final synthetic report that will relate all the investigations to a series of research design hypotheses. Analysis of surface distributions at 41KT42, a late nineteenth- to early twentieth-century ranch line camp known locally as the Ed Scott Cabin, groups the artifacts into material and functional categories that demonstrate primary and secondary refuse accumulations adjacent to the cabin. The distribution of primary refuse shows kitchen artifacts are spatially distinct from other types that include architectural, firearm, ranching, clothing, and personal items. The primary discard pattern is obfuscated by redistribution attributed to secondary refuse discard. The uppermost of two superimposed hearths at 41GR484, the Grape Creek Bench Site, is radiocarbon dated to 260 B.P. and yielded charcoal identified as Carya sp. Excavations were halt~d at this Late Prehistoric II site because of extremely low artifact recovery. Geoarcheological investigations demonstrate that most of the site has been destroyed by cut bank erosion associated with the meanderings of Grape Creek. At 41KT33, the Late Prehistoric I South Sage Creek Site, stone-lined hearth features dated to 1005 B.P. are surrounded by clusters of artifacts. Petrographic analysis of brownware ceramics suggests affiliations with the local Palo Duro Complex and nonlocally with the Pecos River valley. The Gobbler Creek Bridge Site, 4IGR383, spans the late Archaic and Late Prehistoric I periods. Intact· and dispersed stone-lined hearths radiocarbon dated to 1865-1215 B.P. are surrounded by artifact clusters. Both of the sites appear to have been multifunctional campsites, and repeated occupations are likely. Dense concentrations of fire-cracked rocks at these sites may represent secondary refuse disposal. Lithic analysis indicates extensive use of nonlocal materials derived from Cretaceous formations that occur in the Callahan Divide and Edwards Plateau to the south. Freshwater mussels are the only faunal remains recovered from either of these sites. The meat is presumed to have been consumed as food, while the shells sometimes were made into ornaments. An additional 440 acres of land were surveyed for cultural resources; 360 of these acres were subsequently acquired by the City of Lubbock for use as wildlife mitigation lands. Nine prehistoric archeological sites and one isolated find were documented and evaluated for their eligibility for listing on the National Register of Historic Places. Five of these sites are considered to be ineligible for listing on the National Register, and five are potentially eligible for listing. Avoidance is recommended at these five sites, with testing recommended to determine their National Register eligibility if avoidance is not possible. Geological investigations provide information about depositional environments in and near the archeological sites. Two soils buried in the Double Mountain Fork floodplain are radiocarbon dated to 8~00 B.P. and 1700-1300 B.P.; fluvial sediments extend as much as 15 m below these soils in portions of the floodplain. An older terrace previously was identified 18 m above the modem river channel. Current work obtained a terminal date of 8690 B.P. from a buried soil that caps this older terrace. Another radiocarbon date of 3320 B.P. was obtained from fill in a gully that is eroded into the older terrace. These dates bracket an erosional episode when the older terrace was heavily dissected. The erosion coincides with the Altithermal, a period believed to have been characterized by a hot and dry climatic regime.

AbstractThe Valley of the Kings (KV) is a UNESCO world heritage site with more than thirty opened tombs. Since the first tombs were constructed, at least 24 historical flash flood events has been identified, each of which has been contributed to the destruction and deterioration of the tombs. Recently, most of these tombs have been damaged and inundated after 1994 flood. In order to understand the Geo-environmental impact mainly the past flash floods due to the intensive rainfall storm on the valley of kings and the long-term rock mass behavior under geostatic stresses in selected Horemheb tomb (KV57) and its impact on past failures and current stability, Remote sensing, GIS, LIDAR, 3D finite element stability analysis and rock mass quality assessments had been carried out using advanced methods and codes. Our work provides environmental satellite space views via landviewer Erath Observation System (EOS) Platform with passive and active sensors which include the Normalized Difference Vegetation Index (NDVI), Soil-Adjusted Vegetation Index (SAVI), Atmospherically resistant vegetation index (ARVI), Green Chlorophyll Index (GCI), Normalized Burn Ratio (NBR), Normalized Difference Snow Index (NDSI), Light Detection And Ranging (LIDAR) images, Terrain (DEM) Digital Elevation Models, 3D geological maps. In other hand experimental and numerical geotechnical evaluations and modeling of the rock mass of these underground structures and their surroundings have been executed. We estimated the rock mass quality of the different members within the Thebes limestone and Esna shale formations using the mechanical testing and Rock Mass Rating (RMR), rock quality system (Q-system) and Geological Strength Index (GSI) systems. Our recent analyses show that the KV57 rock- cut tomb at Luxor has been cut into poor to very poor quality marl shale masses due to the impact of flash foods. Rock failures of ceilings and pillars were frequently facilitated by local, unfavorably oriented persistent discontinuities, such as tension cracks and faults. Other failures were related to the disintegration of the marl limestone and Esna shale Formations into individual nodules upon weathering. Our data suggest that, in ancient Egypt monumental tomb construction, low-strength rock masses rarely resulted in modifications of the planned tomb design in order to minimise the risk of rock falls and to prevent collapses. The current flood protection measures are not enough. For this two following measures are proposed 1—to rise the current wall by 50 cm. 2—to fill the depression by reshaping bathymetry.

IntroductionThis paper addresses two separate notions of embodiment – western maternal embodiment and art making as a form of embodied critical resistance. It takes as its subject breeder; my unpublished five minute video installation from 2012, which synthesises these two separate conceptual framings of embodiment as a means to visually and conceptually rupture dominant ideologies surrounding Australian motherhood. Emerging from a paradoxical landscape of fear, loathing and desire, breeder is my dark satirical take on ambivalent myths surrounding suburban Australian motherhood. Portraying my white, heavily pregnant body breeding, cooking and consuming pink, sugar-coated butterflies, breeder renders literal the Australian mother as both idealised nation-builder and vilified, self-indulgent abuser. A feminine reification of Goya’s Saturn Devouring His Children, breeder attempts to make visible my own grapplings with maternal ambivalence, to complicate even further, the already strained position of motherhood within the Australian cultural imaginary. Employing the mediums of video and performance to visually manifest an ambivalent protagonist who displays both nurturing maternal ideals and murderous inclinations, breeder pushes contradictory maternal expectations to their breaking point and challengingly offers the following proposition: “This is what you want; but what you’ll get is so much more than you bargained for” (Grosz 136). Drawing upon critical, feminist theorising that challenges idealised views of motherhood; accounts of motherhood by mothers themselves; as well as my own personal grapplings with maternal expectations, this paper weaves reflexive writing with textual analysis to explore how an art-based methodology of embodied critical resistance can problematise representations of motherhood within Australia. By visualising the disjuncture between dominant representations of motherhood that have saturated Australian mainstream media since the late 1990s and the complex ambivalent reality of some women’s actual experiences of mothering, this paper discusses how breeder’s intimate portrayal of maternal domesticity at the limits of tolerability, critically resists socially acceptable mothering practices by satirising the cultural construct of motherhood as a means “to use it, deform it, and make it groan and protest” (Nietzsche qtd. in Gutting).Contradictory Maternal KnowledgeImages of motherhood are all around us; communicating ideals and stereotypes that tell us how mothers should feel, think and act. But these images and the concepts of motherhood that underpin them are full of contradictions. Cultural representations of the idealised and sometimes “yummy mummy” - middle class, attractive, healthy, sexy and heterosexual – (see Fraser; Johnson), contrast with depictions of “bad” mothers, leading to motherhood being simultaneously idealised and demonised within the popular press (Bullen et al.; McRobbie, Top Girls; McRobbie, In the Aftermath; McRobbie, Reflections on Feminism; Walkerdine et al.). Mothers own accounts of motherhood reflect these unsettling contradictions (Miller; Thomson et al.; Wilkinson). Claiming the maternal experience is both “heaven and hell” due to the daily experience of irreconcilable and contradictory feelings (Coward), mothers (myself included), silently struggle between feelings of extreme love and opposing feelings of failure, despair and hate as we get caught up in trying to achieve a set of ideals that promulgate standards of perfection that are beyond our reach. Surrounded by images of motherhood that do not resonate with the contradictory nature of the lived maternal experience, mothers are “torn in two” as we desperately try to reconcile or find absolution for maternal emotions that dominant cultural representations of motherhood render unacceptable. According to Roszika Parker, this complicated and contradictory experience where a mother has both loving and hating feelings for her child is that of maternal ambivalence; a form of exquisite suffering that oscillates between the overwhelming affect of blissful gratification and the raw edges of bitter resentment (Parker 1). As Parker states, maternal ambivalence refers to:Those fleeting (or not so fleeting) feelings of hatred for a child that can grip a mother, the moment of recoil from a much loved body, the desire to abandon, to smash the untouched plate of food in a toddler’s face, to yank a child’s arm while crossing the road, scrub too hard with a face cloth, change the lock on an adolescent or the fantasy of hurling a howling baby out of the window (5).However, it is not only feelings of hatred that stir up ambivalence in the mother, so too can the overwhelming intensity of love itself render the rush of ambivalence so surprising and so painful. Commenting on the extreme contradictory emotions that fill a mother and how not only excessive hatred, but excessive love can turn dangerously fatal, Parker turns to Simone De Beauvoir’s idea of “carnal plenitude”; that is, where the child elicits from the mother, the emotion of domination; where the child becomes the “other” who is both prey and double (30). For Parker, De Beauvoir’s “carnal plenitude” is imaged by mothers in a myriad of ways, from a desire to gobble up the child, to feelings of wanting to gather the child into a fatal smothering hug. Commenting on her own unsettling love/hate relationship with her child, Adrienne Rich describes her experiences of maternal ambivalences as “the murderous alternation between bitter resentment and raw-edged nerves and blissful gratification and tenderness” (363). Unable to come to terms with this paradox at the core of the unfolding process of motherhood, our culture defends itself against this illogical ambivalence in the mother by separating the good nurturing mother from the bad neglectful mother in an attempt to deny the fact that they are one and the same. Resulting in a culture that either denigrates or idealises mothers, we are constantly presented with images of the good perfect nurturing mother and her murderous alter ego; the bad fatal mother who neglects and smothers. This means that how a mother feels about mothering or the meaning it has for her, is heavily determined by cultural representations of motherhood. Arguing for a creative transformation of the maternal that breaches the mutual exclusivities that separate motherhood, I am called to action by Susan Rubin Suleiman, who writes (quoting psychoanalyst Helene Deutsch): “Mothers don’t write, they are written” (Suleiman 5). As a visual attempt to negotiate, translate and thus “write” my lived experience of Australian motherhood, breeder gives voice to the raw material of contradictory (and often taboo experiences) surrounding maternal embodiment and subjectivity. Hijacking and redeploying contradictory understandings and representations of Australian motherhood to push maternal ideals to their breaking point, breeder seeks to create a kind of “mother trouble” that challenges the disjuncture between dominant social constructions of motherhood designed to keep us assigned to our proper place. Viscerally embracing the reality that much of life with small children revolves around loss of control and disintegration of physical boundaries, breeder visually explores the complex and contradictory performances surrounding lived experiences of mothering within Australia to complicate even further the already strained position of western maternal embodiment.Situated Maternal KnowledgeOver the last decade and a half, women’s bodies and their capacity to reproduce have become centre stage in the unfolding drama of Australian economic policy. In 1999 fears surrounding dwindling birth-rates and less future tax revenue, led then Victorian Premier Jeff Kennett to address a number of exclusive private girls’ schools. Making Australia-wide headlines, Kennett urged these affluent young women to abandon their desire for a university degree and instead invited them to consider motherhood as the ultimate career choice (Dever). In 2004, John Howard’s Liberal government made headlines as they announced the new maternity allowance; a $3000 lump-sum financial incentive for women to leave work and have babies. Ending this announcement by urging the assembled gathering of mostly male reporters to go home and have “one for the Dad, one for the Mum and one for the Country” (Baird and Cutcher 103), Federal Treasurer Peter Costello made a last ditch effort to save Baby Boomers from their imminent pensionless doom. Failing to come to terms with the impending saturation of the retirement market without the appropriate tax payer support, the Liberal Government turned baby-making into the ultimate Patriotic act as they saw in women bodies, the key to prevent Australia’s looming economic crisis. However, not all women’s bodies were considered up to the job of producing the longed for “Good tax-paying Citizen” (Tyler). Kennett only visited exclusive private girls’ schools (Ferrier), headhunting only the highest calibre of affluent breeders. Blue-collar inter-mingling was to be adamantly discouraged. Costello’s 2004 “baby bonus” catch-cry not only caused international ire, but also implicitly relegated the duty of child-bearing patriotism to a normalised heterosexual, nuclear family milieu. Unwed or lesbian mothers need not apply. Finally, as government spokespeople repeatedly proclaimed that the new maternity allowance was not income tested, this suggested that the target nation-builder breeder demographic was the higher than average income earner. Let’s get it straight people – only highly skilled, high IQ’s, heterosexual, wedded, young, white women were required in this exclusive breeding program (see Allen and Osgood; Skeggs; Tyler). And if the point hadn’t already been made perfectly clear, newspaper tabloids, talkback radio and current affairs programs all over the country were recruited to make sure the public knew exactly what type of mother Australia was looking for. Out of control young, jobless single mothers hit the headlines as fears abounded that they were breeding into oblivion. An inherently selfish and narcissistic lot, you could be forgiven for thinking that Australia was running rampant with so-called bogan single mothers, who left their babies trapped in hot airless cars in casino carparks all over the country as they spent their multiple “baby bonus’” on booze, ciggies, LCD’s and gambling (see Milne; O’Connor; Simpson and Dowling). Sucking the economy dry as they leeched good tax-payer dollars from Centrelink, these undesirables were the mothers Australia neither needed nor wanted. Producing offspring relegated to the category of bludgerhood before they could even crawl, these mothers became the punching bag for the Australian cultural imaginary as newspaper headlines screamed “Thou Shalt Not Breed” (Gordon). Seen as the embodiment of horror regarding the ever out-of-control nature of women’s bodies, these undesirable mothers materialised out of a socio-political landscape that although idealised women’s bodies as Australia’s economic saviour, also feared their inability to be managed and contained. Hoarding their capacity to reproduce for their own selfish narcissistic desires, these white trash mothers became the horror par excellence within the Australian cultural imaginary as they were publically regarded as the vilified evil alter-ego of the good, respectable white affluent young mother Australian policy makers were after. Forums all over the country were inundated. “Yes,” the dominant voices seemed to proclaim: “We want to build our population. We need more tax-paying citizens. But we only want white, self-less, nurturing, affluent mothers. We want women who can breed us moral upstanding subjects. We do not want lazy good for nothing moochers.” Emerging from this paradoxical maternal landscape of fear, loathing and desire, breeder is a visual and performative manifestation of my own inability to come to terms with the idealisation and denigration of motherhood within Australia. Involving a profound recognition that the personal is still the political, I not only attempt to visually trace the relationship between popular Australian cultural formations and individual experiences, but also to visually “write” my own embodied grapplings with maternal ambivalence. Following the premise that “critique without resistance is empty and resistance without critique is blind” (Hoy 6), I find art practice to be a critically situated and embodied act that can openly resist the power of dominant ideologies by highlighting maternal corporeal transgressions. A creative destablising action, I utilise the mediums of video and performance within breeder to explore personal, historical and culturally situated expectations of motherhood within Australia as a means to subvert dominant ideologies of motherhood within the Australian cultural imaginary. Performing Maternal KnowledgeReworking Goya’s Romantic Gothic vision of fatherhood in Saturn Devouring His Children, breeder is a five minute two-screen video performance that puts an ironic twist to the “good” and “bad” myths of Australian motherhood. Depicting myself as the young white heavily pregnant protagonist breeding monarch butterflies in my suburban backyard, sugar-coating, cooking and then eating them, breeder uses an exaggerated kitsch aesthetic to render literal the Australian mother as both idealistic nation-builder and self-indulgent abuser. Selfishly hoarding my breeding potential for myself, luxuriating and devouring my “offspring” for my own pleasure and delight rather than for the common good, breeder simultaneously defies and is complicit with motherhood expectations within the suburban Australian imaginary. Filmed in my backyard in the southern suburbs of Perth, Western Australia, breeder manifests my own maternal ambivalence and deliberately complicates the dichotomous and strained position motherhood holds in western society. Breeder is presented as a two screen video installation. The left screen is a fast-paced, brightly coloured, jump-cut narrative with a pregnant protagonist (myself). It has three main scenes or settings: garden, kitchen and terrace. The right screen is a slow-moving flow of images that shows the entire monarch butterfly breeding cycle in detail; close ups of eggs slowly turning into caterpillars, caterpillars creating cocoons and the gradual opening of wings as butterflies emerge from cocoons. All the while, the metamorphic cycle is aided by the pregnant protagonist, who cares for them until she sets them free of their breeding cage. In the left screen, apricot roses, orange trees, yellow hibiscus bushes, lush green lawns, a swimming pool and an Aussie backyard garden shed are glimpsed as the pregnant protagonist runs, jumps and sneaks up on butterflies while brandishing a red-handled butterfly net; dressed in red high heels and a white lace frock. Bunnies with pink bows jump, dogs in pink collars bark and a very young boy dressed in a navy-blue sailor suit all make cameo appearances as large monarch butterflies are collected and placed inside a child’s cherry red insect container. In a jump-cut transition, the female protagonist appears in a stark white kitchen; now dressed in a bright pink and apricot floral apron and baby-pink hair ribbon tied in a bow in her blonde ponytail. Standing behind the kitchen bench, she carefully measures sugar into a bowl. She then adds pink food colouring into the crystal white sugar, turning it into a bright pink concoction. Cracking eggs and separating them, she whisks the egg whites to form soft marshmallow peaks. Dipping a paint brush into the egg whites, she paints the fluffy mixture onto the butterflies (now dead), which are laid out on a well-used metal biscuit tray. Using her fingers to sprinkle the bright pink sugar concoction onto the butterflies, she then places them into the oven to bake and stands back with a smile. In the third and final scene, the female protagonist sits down at a table in a garden terrace in front of French-styled doors. Set for high tea with an antique floral tea pot and cup, lace table cloth and petit fours, she pours herself a cup of tea. Adding a teaspoon of sugar, she stirs and then selects a strawberry tart from a three-tiered high-tea stand that holds brightly iced cupcakes, cherry friands, tiny lemon meringue pies, sweet little strawberry tarts and pink sugar coated butterflies. Munching her way through tarts, pies, friands and cupcakes, she finally licks her lips and fuchsia tipped fingers and then carefully chooses a pink sugar coated butterfly. Close ups of her crimson coated mouth show her licking the pink sugar-crumbs from lips and fingers as she silently devours the butterfly. Leaning back in chair, she smiles, then picks up a pink leather bound book and relaxes as she begins to read herself into the afternoon. Screen fades to black. ConclusionAs a mother I am all fragmented, contradictory; full of ambivalence, love, guilt and shame. After seventeen years and five children, you would think that I would be used to this space. Instead, it is a space that I battle to come to terms with each and every day. So how to strategically negotiate engrained codes of maternity and embrace the complexities of embodied maternal knowledge? Indeed, how to speak of the difficulties and incomparable beauties of the maternal without having those variously inflected and complex experiences turn into clichés of what enduring motherhood is supposed to be? Visually and performatively grappling with my own fallout from mothering ideals and expectations where sometimes all I feel I am left with is “a monster of selfishness and intolerance” (Rich 363), breeder materialises my own experiences with maternal ambivalence and my inability to reconcile or negotiate multiple contradictory identities into a single maternal position. Ashamed of my self, my body, my obsessions, my anger, my hatred, my rage, my laughter, my sorrow and most of all my oscillation between a complete and utter desire to kill each and every one of my children and an overwhelming desire to gobble them all up, I make art work that is embedded in the grime and grittiness of my everyday life as a young mother living in the southern suburbs of Western Australia. A life that is most often mundane, sometimes sad, embarrassing, rude and occasionally heartbreaking. A life filled with such simple joy and such complicated sorrow. A life that in reality, is anything but manageable and contained. Although this is my experience, I know that I am not the only one. As an artist I engage in the embodied and critically resistant practice of sampling from my “mother” identities in order to bring out multiple, conflictive responses that provocatively encourage new ways of thinking and acknowledging embodied maternal knowledge. Although claims abound that this results in a practice that is “too personal” or “too specific” (Liss xv), I do not believe that this in fact risks reifying essentialism. Despite much feminist debate over the years regarding essentialist/social constructivist positions, I would still rather use my body as a site of embodied knowledge then rhetorically give it up. Acting as a disruption and challenge to the concepts of idealised or denigrated maternal embodiment, the images and performances of motherhood in breeder then, are more than simple acknowledgements of the reality of the good and bad mother, or acts reclaiming an identity that they taught me to despise (Cliff) or rebelling against having to be a "woman" at all. Instead, breeder is a lucid and explicit declaration of intent that politely refuses to keep every maternal body in its place.References Allen, Kim, and Jane Osgood. “Young Women Negotiating Maternal Subjectivities: The Significance of Social Class.” Studies in the Maternal. 1.2 (2009). 30 July 2012 ‹www.mamsie.bbk.ac.uk›.Almond, Barbara. The Monster Within. Berkeley: University of California Press, 2011.Baird, Marian, and Leanne Cutcher. “’One for the Father, One for the Mother and One for the Country': An Examination of the Construction of Motherhood through the Prism of Paid Maternity Leave.” Hecate 31.2 (2005): 103-113. 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