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1.
Hans-Georg Bohle 《GeoJournal》1994,34(3):245-251
The perspective of the paper is that of urban metabolism which views cities, metaphorically, as metabolic processes which take in people, food, resources, and energy, transform these into a distinctive quality of life, and emit people, products, and wastes. The paper focuses on urban food metabolism, by using the concept of the food system which includes the sub-systems of production, supply, distribution and consumption of food. The paper seeks to review the state of knowledge for each of these sub-systems, to provide examples that illustrate the functioning and determinants of urban food systems, to identify critical gaps in knowledge, to outline central research desiderata and to examine critically the analytic value of the concept of urban food metabolism.Revised version of a paper presented to the International Symposium on Urban Metabolism, held in Kobe, Japan, September 6–11, 1993 相似文献
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Prof. Dr. Dietrich Helmcke Dr. Hans-Georg Lindenberg 《International Journal of Earth Sciences》1983,72(1):317-328
The main aspects of the geosynclinal and orogenic evolution of the Petchabun foldbelt in Central Thailand are described. This area was previously thought to be deformed by the Indosinian (Triassic) orogeny. The new data show that the main orogenic event in Thailand can be dated: Post Lower Permian — Pre Uppermost Permian. Evidence is given that Paleotethys closed on Thai territory during this orogenic event. The known Upper Triassic deformations in Northern Thailand are supposed to be strictly intracontinental and therefore of minor importance.
Zusammenfassung Die Grundzüge der geosynklinalen und orogenen Entwicklung des Faltengürtels von Petchabun werden beschrieben. Bisher wurde angenommen, daß dieses Gebiet während der Indosinischen Orogenese (Trias) deformiert wurde. Die neuen Daten belegen, daß die bedeutendste Orogenese in Thailand nach dem Unter Perm einsetzte (West-Thailand) und vor dem höchsten Perm abgeschlossen war (Petchabun). Die sog. Paleotethys wurde während dieser Orogenese hier geschlossen. Die bekannten obertriadischen Deformationen sind dagegen rein intrakontinental und somit von untergeordneter Bedeutung.
Résumé Les traits principaux du développement géosynclinal et orogénique de la ceinture plissée du Petchabun (Thailande) sont décrits. Jusqu'à présent on pensait que cette région avait été déformée pendant l'orogenèse «Indosinienne» (Trias). Les données nouvelles indiquent que l'orogenèse la plus importante a commencée après le Permien inférieur (dans l'Ouest de la Thailande) et qu'elle s'est terminée avant le Permien supérieur (région de Petchabun). Ici, la soi-disant «Paléotéthys» s'est fermée au cours de cette orogenèse. Les déformations bien connues du Trias supérieur sont exclusivement intracontinentales et n'ont ainsi qu'une signification subordonnée.
Petchabun. , (). , ( ) (Petchabun). . . .相似文献
3.
Amelie Bücker Patricio Crespo Hans-Georg Frede Kellie Vaché Felipe Cisneros Lutz Breuer 《Aquatic Geochemistry》2010,16(1):127-149
We investigated controls on the water chemistry of a South Ecuadorian cloud forest catchment which is partly pristine, and
partly converted to extensive pasture. From April 2007 to May 2008 water samples were taken weekly to biweekly at nine different
subcatchments, and were screened for differences in electric conductivity, pH, anion, as well as element composition. A principal
component analysis was conducted to reduce dimensionality of the data set and define major factors explaining variation in
the data. Three main factors were isolated by a subset of 10 elements (Ca2+, Ce, Gd, K+, Mg2+, Na+, Nd, Rb, Sr, Y), explaining around 90% of the data variation. Land-use was the major factor controlling and changing water
chemistry of the subcatchments. A second factor was associated with the concentration of rare earth elements in water, presumably
highlighting other anthropogenic influences such as gravel excavation or road construction. Around 12% of the variation was
explained by the third component, which was defined by the occurrence of Rb and K and represents the influence of vegetation
dynamics on element accumulation and wash-out. Comparison of base- and fast flow concentrations led to the assumption that
a significant portion of soil water from around 30 cm depth contributes to storm flow, as revealed by increased rare earth
element concentrations in fast flow samples. Our findings demonstrate the utility of multi-tracer principal component analysis
to study tropical headwater streams, and emphasize the need for effective land management in cloud forest catchments. 相似文献
4.
Hans-Georg Bohle Dr. 《GeoJournal》1985,10(1):5-15
The paper is an attempt on polarized development. over the last millennium, focussing on a small agrarian region in the Tamil country of South India. From the perspective of Friedmann's General Theory, the paper traces the development of this region through five successive stages of integration, each of which encompassed the study area into a wider and more complex spatial system. Elementary innovations are identified that, at each of these stages, generated specific types of authority-dependency relationships which, in turn, integrated the respective innovative cores and their dependent peripheries into single spatial systems. The paper shows how the institutional and spatial structures of rural South India have been successively transformed in this process, to serve the needs of the various core regions. It also demonstrates how, since colonial times, new types of authority-dependency relationships have emerged that, by organizing the dependency of the peripheries through systems of market and supply, have resulted in development of the core regions, on the one hand, and underdevelopment of the peripheries, on the other. 相似文献
5.
Alexander Zaporozec Arvi Valmari Hans-Georg Bohle G. Kunkel Rolf H. K?se et al. 《GeoJournal》1989,18(4):456-458
The International Geographical Union Reports
IGU Commission on Geographic Information SystemsGoegraphic information systems in higher education — A workshop — Columbus, Ohio, June 10–11, 1989 相似文献6.
7.
Iuliia Radchenko Yvonne Dernedde Birgit Mannig Hans-Georg Frede Lutz Breuer 《Water Resources》2017,44(5):707-730
The main freshwater source of arid/semi-arid Central Asia is stored in its high mountain glaciers. Water for the downstream countries is mainly supplied through the Syrdarya River that originates at the confluence of the Naryn and Karadarya rivers in the Ferghana Valley. Runoff generation from glaciers plays a crucial role, although a considerable number of small tributaries supply the river with additional runoff from snowmelt and rain in the mountains surrounding the Ferghana Valley. Observations of rising air temperature and accelerated glacier shrinkage make it most likely that the relative contributions of the smaller tributaries will increase. Hitherto, assessments of climate change effects on the water resource availability have largely neglected the growing importance of the runoff from smaller tributaries. We used a dynamically downscaled A1B SRES scenario for climate change effects for the period 2071–2100 in relation to the reference period of 1971–2000 and a version of the conceptual hydrological Hydrologiska Byråns Vattenavdelning model (HBV-light) to estimate runoff contributions with particular respect to the small tributaries. The simulations showed a 12–42% decrease in summer runoff; and a 44–107% increase in winter-spring runoff. This indicates the hydrological regime is shifting towards a runoff from snowmelt earlier in the year. The study suggests that actions for climate change adaptation should be complemented by land management configured to secure optimal runoff supplement from the smaller catchments. 相似文献
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An improved and extended GPS-derived 3D velocity field of the glacial isostatic adjustment (GIA) in Fennoscandia 总被引：1，自引：1，他引：1
Martin Lidberg Jan M. Johansson Hans-Georg Scherneck James L. Davis 《Journal of Geodesy》2007,81(3):213-230
We present a new GPS-derived 3D velocity field for the Fennoscandia glacial isostatic adjustment (GIA) area. This new solution
is based upon ∼3,000 days of continuous GPS observations obtained from the permanent networks in Fennoscandia. The period
encompasses a prolongated phase of stable observation conditions after the northern autumn of 1996. Several significant improvements
have led to smaller uncertainties and lower systematic errors in the new solutions compared to our previous results. The GPS
satellite elevation cut-off angle was lowered to 10°, we fixed ambiguities to integers where possible, and only a few hardware
changes occurred over the entire network. The GAMIT/GLOBK software package was used for the GPS analysis and reference frame realization. Our new results confirmed earlier findings
of maximum discrepancies between GIA models and observations in northern Finland. The reason may be related to overestimated
ice-sheet thickness and glaciation period in the north. In general, the new solutions are more coherent in the velocity field,
as some of the perturbations are now avoided. We compared GPS-derived GIA rates with sea-level rates from tide-gauge observations,
repeated precise leveling, and with GIA model computations, which showed consistency. 相似文献