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Estimating groundwater recharge from conservation bench terracesNeibling, William H January 2011 (has links)
Digitized by Kansas Correctional Industries
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Make place for thy Lydian kings: monumental urban terraces of Iron Age SardisEren, Guzin 17 June 2023 (has links)
The map of Iron Age Anatolia (ca. 1200-550 BCE, Turkey) is dotted by territorial kingdoms that rose and were subsumed into larger political entities throughout its history. Current archaeological narratives commonly place Lydia into this scene quite late in the Iron Age with the rise of its Mermnad elite in the seventh century BCE. Their power is well attested by the rapid expansion of their influence in Anatolia, as well as by their ambitious buildings programs that monumentalized their capital city Sardis. Among these programs, monumental urban terrace platforms hold a unique position, for they regularized the rugged topography of a naturally elevated district at the heart of Sardis, converting it into a visibly dominant promontory to house the Lydian palace. Until recently there were no precedents for these enormous man-made investments, hence the narrative of the Mermnad elite’s late and fast emergence and the reconstruction of Sardis as an agglomeration of small sites before their time.
The fresh discovery of a long sequence of large-scale constructions (2000-700 BCE) in the city’s elite precinct now casts doubt on this narrative. In this dissertation, I study these early monumental constructions along with the later terraces to investigate the course of Lydian elite placemaking and their wider implications for Lydia’s place in Iron Age Anatolia. This research is multi-scalar, expanding out from a detailed study of architecture, to the place of terraces within the socio-spatial fabric of diachronic settlements at Sardis, and finally to wider regional Anatolian context. I begin with the examination of the corpus of urban terrace constructions in Sardis and their architectural design principles and dating evidence. Next, I compare the terraces to constructions from domestic neighborhoods as well as other Mermnad elite structures. Their scalar facets—large size, costly materials, and large labor requirements—mark them as monumental in each building episode. I consider symbolic and experiential facets using a variety of theoretical frameworks—memory, social submission, performance, and domination—to demonstrate how these terraces shaped their socio-spatial environments through ongoing claims of an old central precinct. This was achieved by introducing architectural novelties as well as more formality and regularity, employing transformative labor as a means of public spectacle and creating built representations of spatial control and domination. At the same time, I show the extent to which these practices foreshadow Mermnad elite placemaking ideologies. Thus, this research marks Lydian constructions in the ninth and eighth centuries BCE as productions of a previously unregistered early Lydian elite. I conclude by contextualizing early Lydian placemaking practices within Anatolia’s broader socio-political spheres. This study reveals terracing to demarcate elite space as a Lydian mode of placemaking and that in timing and ideology it followed the culture-political trajectories of Anatolia—by peer-polity competition—more so than those of the Aegean. As a result, I acknowledge the deeper history of the ruling elite in Lydia, one that reverses the narrative of a sudden, late, and rapid development fostered by the Mermnads. This study, thus, makes a place for Lydia in the Iron Age maps of Anatolia two centuries earlier than has been previously believed.
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Nitrate and water under terraced dryland wheat production in OregonStrock, Jeffrey S. 27 April 1995 (has links)
Dry land agriculture using summer fallow is a common crop production
practice in the Columbia Plateau region of eastern Oregon. Farmed-over level
terraces are used to control surface water runoff and soil erosion. More than
70 percent of the average annual precipitation around Pendleton, Oregon (350 -
400 mm) falls as low intensity, long duration rainfall from September to March.
Wetter soil zones typically occur above and below the terrace. These areas
have a higher potential for crop production as well as for movement of
chemicals to ground water and to surface water where seepage occurs. The
extra nitrogen or water that could accumulate in these areas needs to be
considered in managing these areas.
The first objective of this study was to measure the distribution of nitrate
nitrogen (NO���-N) and water in relation to farmed-over level terraces, and infer
potential solute flow patterns from changes in the measured distributions over
time. The second objective was to make recommendations regarding
management practices required for specific field locations to maximize crop
production and minimize negative impacts on groundwater quality.
Results indicate NO������ concentrations following harvest were < 4 mg kg����� of soil. Equivalent to soil solution concentrations between 27 and 20 mg L����� at 15 and 20 percent volumetric water content, respectively. Limited deep percolation of NO������ occurred below the root zone between harvest and planting. The NO������ concentrations below the root zone were < 1 to 15 mg kg����� following the summer fallow period. In August 1993, evidence exists that shows N applied fertilizer moved out of the surface 0.3 m and deeper into the profile. The redistribution of NO������ in the terrace channels of transects 1 and 2 strongly support this. Soil profiles that contain high residual concentrations of NO���-N during the fallow period increase the potential for NO���-N leaching below the root zone. Unusually heavy precipitation during normally dry periods or above normal winter precipitation increases the potential for NO���-N leaching below the root zone. / Graduation date: 1995
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El sub-aprovechamiento del suelo del sistema de andenería de la comunidad campesina San Pedro de Laraos, Huarochirí, Lima / El sub-aprovechamiento del suelo del sistema de andenería de la comunidad campesina San Pedro de Laraos, Huarochirí, LimaYakabi Bedriñana, Katiusca Susana 10 April 2018 (has links)
Highland terracing systems are a technology used in the ancient Andes to expand the agricultural frontier; then, that technology became an important source of food for the Incas. Research shows that the productivity of land was due to the form of construction of the platforms, but there are few studies that analyze soil fertility. In order to demonstrate the fertility in the terraces, soil physical and chemical properties were compared in three different sectors: terraces at rest, abandoned terraces and a hillside with no technology. They all belong to the terracing system of San Pedro de Laraos town, in Huarochiri, Lima. In all three sectors loam predominates. The soil pH is within the range of high bioavailability of most nutrients (5.5 to 7.5), except for two points on the slope without platforms. The soil electrical conductivity presents ranges that qualify the three areas as "no saline" (< 2 dS / m). The organic matter is in the appropriate percentages (3-5%), especially on the terraces at rest, which also have the highest content of NPK. In conclusion, the soil of the three zones does not differ significantly in their physical parameters, but it differs in the chemical parameters, especially in the content of macronutrients; the better range is in terraces at rest. However, the community of Laraos does not take advantage of it soil fertility; actually, most of their terracing system is abandoned and the structures are in a deterioration process. / Los sistemas de andenería son una tecnología prehispánica utilizada en los Andes para ampliar la frontera agrícola, llegándose a convertir en una importante fuente de alimentos para los Incas. Investigaciones señalan que la productividad de las tierras fue resultado de la forma de construcción de los andenes, pero son pocos los estudios que analizan la condición fértil del suelo propiamente. Para demostrar la fertilidad del suelo de los andenes, se compararon las propiedades físicas y químicas del suelo en tres zonas: andenes en descanso, andenes abandonados y ladera sin andenes, todos pertenecientes al sistema de andenería de la localidad de San Pedro de Laraos, provincia de Huarochirí, Lima. En los tres sectores predomina la textura franca. El pH se encuentra dentro del rango de mayor disponibilidad de nutrientes (5,5 – 7,5), con excepción de dos puntos en la ladera sin andenes. La conductividad eléctrica presenta rangos que califican al suelo de las tres zonas como “no salinos” (0,174 – 0,683 dS/m). La materia orgánica está en los porcentajes adecuados (3 – 5 %), sobre todo en los andenes en descanso, que de igual manera tenían los contenidos más elevados de NPK. Se concluye que el suelo de las tres zonas no difiere significativamente en sus parámetros físicos, pero sí en los parámetros químicos, especialmente en los contenidos de macronutrientes, siendo los andenes en descanso los que presentan valores dentro de los rangos ideales. Sin embargo, la comunidad larahuina no aprovecha la fertilidad de sus suelos, dejando sus andenes abandonados y en proceso de deterioro.
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Urban Agriculture within the Valley of Oaxaca: Investigations and Implications of Agricultural Terracing at Monte Alban, OaxacaTricarico, Anthony 01 January 2015 (has links)
The implementation of geographic information systems for the analysis of Late Classic (500-800 C.E.) terraces at Monte Albán, reveals a spatial pattern not visible through prior pedestrian site surveys. The Valley of Oaxaca Settlement Pattern Project concluded that nearly all of the 1,464 Late Classic terraces at Monte Albán were used for residential purposes. Spatial analysis tools reveal a greater human-ecological complexity. The goal of this study was to use ArcGIS to map the 1,273 terraces near Monte Albán's ceremonial center and combine them with individually identifiable data sets. Analysis of each terrace, particularly based upon water availability, ceramic distribution, structural remains, and number of metates, reveals that 55.7% of these 1,273 terraces could have supported agricultural practices. The integration of agricultural space into a dense urban center reveals new spatial relationships between population density and urban agricultural practices, to which measures of resiliency and efficacy within similar modern systems can be applied.
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Dinâmica da água em terraços de infiltração. / Water dynamics in level terraces.Castro, Luciana Gomes 14 December 2001 (has links)
O terraceamento é uma prática de conservação do solo que visa reduzir a perda de água e solo pela interceptação de enxurradas que ocorrem quando a intensidade da chuva supera a capacidade de infiltração de água no solo. Atualmente, o dimensionamento dos terraços tem sido feito com base em conhecimento empírico; no entanto, um conhecimento mais detalhado da física dos processos que regem o funcionamento dos terraços possibilitaria otimizar o dimensionamento dos terraços. No presente estudo foi avaliada a capacidade de infiltração de água no canal de um terraço em nível pelos métodos da densidade de fluxo e da armazenagem de água em diferentes condições de manejo agrícola (solo nu, solo gramado e solo sob preparo convencional e plantio direto para a implantação da cultura de milho) num Latossolo vermelho com declividade média de 0,08 m m-1. Em cada tratamento foram instaladas sondas de TDR em três pontos de observação no centro do canal do terraço (distanciados de 4 m entre si e considerados como repetições), nas rofundidades de 0,05, 0,10, 0,20, 0,40, 0,60 e 0,80 m. Nestas mesmas profundidades amostras indeformadas de solo foram retiradas para determinação da densidade e curva de retenção de água no solo. As leituras das guias de onda do TDR foram feitas automaticamente e a intensidade de chuva monitorada por um pluviômetro automatizado. Ao final de cada evento de chuva erosiva a deposição de solo foi medida por meio de 14 pontos de observação dispostos ao longo do centro do canal do terraço de cada tratamento. Durante a estação seca (julho-agosto), a condutividade hidráulica do solo não saturado foi determinada em cada repetição nas mesmas profundidades, utilizando o método do perfil instantâneo. Os resultados demonstraram que os manejos agrícolas influenciam na deposição de água e solo sobre o canal do terraço e estas na formação de selo superficial e na capacidade de infiltração de água do canal. Conclui-se que a alta variação comumente obtida entre as repetições de determinação da condutividade hidráulica implica em dificuldades quando se objetiva detectar pequenas diferenças nas densidades de fluxo entre tratamentos. Assim, mostrou ser inviável utilizar densidades de fluxo calculadas pela equação de Darcy-Buckingham para encontrar diferenças em taxas de infiltração em terraços em nível. Essa conclusão reforça-se devido às condições superficiais altamente variáveis encontradas em canais de terraços em nível devido a deposições irregulares do material erodido. Uma metodologia para se realizar medições da umidade nas deposições sobre o canal deve ser desenvolvida para aumentar a acurácia da medida da armazenagem. A taxa de infiltração de água no canal do terraço não pode ser estimada pela variação da armazenagem da água no solo somente, devido ao papel importante da drenagem profunda e, possivelmente, da absorção de água pela camalhão do terraço. Uma adequada estimativa da taxa de infiltração no canal do terraço, imprescindível para seu dimensionamento, deve aliar um grande número de repetições, além da medição da umidade no interior da camada de material depositado sobre o canal ao longo do tempo. / Terracing is a soil conservation practice that aims to reduce water and soil loss by interception of runoff that occurs when rainfall intensities exceed infiltration capacity. Actually, dimensions of terraces are being determined in an empirical way; however, a more detailed understanding of the physics behind the hydrological functions of terraces would allow an optimized dimensioning of terraces. In this study the infiltration capacity of a level terrace was evaluated by the methods of flux density and water storage, under different management conditions (bare soil, pasture, conventionally tilled maize and zero-tillage maize) on an oxisol with a slope of 0.08 m m-1. In each treatment TDR sensors were installed at three observation points in the middle of the terrace canal (distance between points: 4 m; considered to be repetitions) at the depths of 0.05, 0.10, 0.20, 0.40, 0.60 and 0.80 m. At the same depths, undisturbed soil samples were taken to determine soil density and soil water retention curve. TDR readings were made automatically and a rainfall gauge automatically monitored rainfall intensity. At the end of each rainfall event, soil deposition was measured at 14 locations in the terrace canal in each treatment. During the dry season (July-August), unsaturated hydraulic conductivity was determined at each repetition at the same depths by the instantaneous profile method. The results showed that agricultural management influenced water and soil deposition in the terrace canal and these affected surfaced sealing and infiltration capacity. It was concluded that the high variation usually obtained between repetitions of the hydraulic conductivity determinations makes the detection of small differences between flux densities difficult. Therefore, it showed to be impossible to use flux densities calculated by Darcy-Buckingham equation in the order to prove existence of different infiltration rates in level terraces. This conclusion was reinforced due to the highly variable surface conditions in the terrace canal. A methodology to measure water contents within the depositions in the canal should be developed to increase the precision of water storage estimation. Infiltration rates in the terrace canal cannot be estimated by storage variation alone, due to the important role of drainage and, possibly, ascension of water in the terrace hill. A correct estimate of the infiltration rate in the canal, necessary for its dimensioning, should combine a high number of repetitions with the measurement of water content within the layer of deposits over the terrace canal surface along time.
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Dinâmica da água em terraços de infiltração. / Water dynamics in level terraces.Luciana Gomes Castro 14 December 2001 (has links)
O terraceamento é uma prática de conservação do solo que visa reduzir a perda de água e solo pela interceptação de enxurradas que ocorrem quando a intensidade da chuva supera a capacidade de infiltração de água no solo. Atualmente, o dimensionamento dos terraços tem sido feito com base em conhecimento empírico; no entanto, um conhecimento mais detalhado da física dos processos que regem o funcionamento dos terraços possibilitaria otimizar o dimensionamento dos terraços. No presente estudo foi avaliada a capacidade de infiltração de água no canal de um terraço em nível pelos métodos da densidade de fluxo e da armazenagem de água em diferentes condições de manejo agrícola (solo nu, solo gramado e solo sob preparo convencional e plantio direto para a implantação da cultura de milho) num Latossolo vermelho com declividade média de 0,08 m m-1. Em cada tratamento foram instaladas sondas de TDR em três pontos de observação no centro do canal do terraço (distanciados de 4 m entre si e considerados como repetições), nas rofundidades de 0,05, 0,10, 0,20, 0,40, 0,60 e 0,80 m. Nestas mesmas profundidades amostras indeformadas de solo foram retiradas para determinação da densidade e curva de retenção de água no solo. As leituras das guias de onda do TDR foram feitas automaticamente e a intensidade de chuva monitorada por um pluviômetro automatizado. Ao final de cada evento de chuva erosiva a deposição de solo foi medida por meio de 14 pontos de observação dispostos ao longo do centro do canal do terraço de cada tratamento. Durante a estação seca (julho-agosto), a condutividade hidráulica do solo não saturado foi determinada em cada repetição nas mesmas profundidades, utilizando o método do perfil instantâneo. Os resultados demonstraram que os manejos agrícolas influenciam na deposição de água e solo sobre o canal do terraço e estas na formação de selo superficial e na capacidade de infiltração de água do canal. Conclui-se que a alta variação comumente obtida entre as repetições de determinação da condutividade hidráulica implica em dificuldades quando se objetiva detectar pequenas diferenças nas densidades de fluxo entre tratamentos. Assim, mostrou ser inviável utilizar densidades de fluxo calculadas pela equação de Darcy-Buckingham para encontrar diferenças em taxas de infiltração em terraços em nível. Essa conclusão reforça-se devido às condições superficiais altamente variáveis encontradas em canais de terraços em nível devido a deposições irregulares do material erodido. Uma metodologia para se realizar medições da umidade nas deposições sobre o canal deve ser desenvolvida para aumentar a acurácia da medida da armazenagem. A taxa de infiltração de água no canal do terraço não pode ser estimada pela variação da armazenagem da água no solo somente, devido ao papel importante da drenagem profunda e, possivelmente, da absorção de água pela camalhão do terraço. Uma adequada estimativa da taxa de infiltração no canal do terraço, imprescindível para seu dimensionamento, deve aliar um grande número de repetições, além da medição da umidade no interior da camada de material depositado sobre o canal ao longo do tempo. / Terracing is a soil conservation practice that aims to reduce water and soil loss by interception of runoff that occurs when rainfall intensities exceed infiltration capacity. Actually, dimensions of terraces are being determined in an empirical way; however, a more detailed understanding of the physics behind the hydrological functions of terraces would allow an optimized dimensioning of terraces. In this study the infiltration capacity of a level terrace was evaluated by the methods of flux density and water storage, under different management conditions (bare soil, pasture, conventionally tilled maize and zero-tillage maize) on an oxisol with a slope of 0.08 m m-1. In each treatment TDR sensors were installed at three observation points in the middle of the terrace canal (distance between points: 4 m; considered to be repetitions) at the depths of 0.05, 0.10, 0.20, 0.40, 0.60 and 0.80 m. At the same depths, undisturbed soil samples were taken to determine soil density and soil water retention curve. TDR readings were made automatically and a rainfall gauge automatically monitored rainfall intensity. At the end of each rainfall event, soil deposition was measured at 14 locations in the terrace canal in each treatment. During the dry season (July-August), unsaturated hydraulic conductivity was determined at each repetition at the same depths by the instantaneous profile method. The results showed that agricultural management influenced water and soil deposition in the terrace canal and these affected surfaced sealing and infiltration capacity. It was concluded that the high variation usually obtained between repetitions of the hydraulic conductivity determinations makes the detection of small differences between flux densities difficult. Therefore, it showed to be impossible to use flux densities calculated by Darcy-Buckingham equation in the order to prove existence of different infiltration rates in level terraces. This conclusion was reinforced due to the highly variable surface conditions in the terrace canal. A methodology to measure water contents within the depositions in the canal should be developed to increase the precision of water storage estimation. Infiltration rates in the terrace canal cannot be estimated by storage variation alone, due to the important role of drainage and, possibly, ascension of water in the terrace hill. A correct estimate of the infiltration rate in the canal, necessary for its dimensioning, should combine a high number of repetitions with the measurement of water content within the layer of deposits over the terrace canal surface along time.
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