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Research on the Trend and Evolution of Luanhe River Delta

Author: WangPingGe
Tutor: HuangHuaFang
School: Hebei Normal
Course: Physical Geography
Keywords: Holocene Historical period Luan River Delta Geoscience environment Evolution of Regional economic development
CLC: P343.5
Type: Master's thesis
Year: 2008
Downloads: 208
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Abstract

With the economic development and global climate change, land and sea interaction under the Delta region is becoming a national research and the focus of attention. Delta countries intensified, and has made considerable progress. But these studies mainly focused on the rich resources, geographically large delta very important for the distribution of the common, a large number of small and medium-sized Delta has yet to be in-depth. The Luan River Delta is a typical representative of the small and medium-sized Delta, from a scientific perspective, Luan River delta depositional system in the process of historical development, often due to multiple transfers form more intertwined stacked delta complex developmental complete typical deposition combined its sedimentary sequences overlying and underlying layer properties, not only the causes of the delta system and paleogeographic study of the whole region is of great significance. From the perspective of economic development, the the the Luan River Delta is the hub area of ??land and sea transport network cable, port construction, natural and economic advantage. The Luan River Delta in the protection of the ecological environment in the land and sea between human activity intervention strongly Strip relatively fragile ecological environment, reasonable protection need to explore ways and means. The large hydro Luan River in recent years, the implementation of watershed management the - Panjiakou Daheiting Taolinkou successively enabled, decreasing water and sediment, modern Luan River Delta affects how evolution again the attention of domestic geologists. This article relying Hebei Province, 908 special marine resources survey and evaluation issues, conducted a systematic study of the geology and geography angle of Luan River Delta region. In the collection of the previous range of information and results on the basis of theoretical methods of applied geology and paleontology, combined with field investigation and laboratory analysis, sedimentary characteristics of Luan River Delta, on the basis of the evolution of systems analysis Luan River Delta school environment investigate the formation and evolution of the Luan River Delta and trends, combined with its location advantages discussed the Luan River Delta regional economic development issues. The study showed that: ① Luan River tectonic activity as the driving force, after several diversions has formed since the late Pleistocene the three vertices alluvial fan Plumper, West Xiakou and Luanxian. ② since the Holocene alluvial fan formed based on successively formed five delta accumulation body, that so far remains in the the Qilihai near the early Holocene Delta Maastricht at the vertices of the mid-Holocene delta Ting river the vertex the history of early delta, horse Zhuangzi the vertex history late Delta and the vertices Lianhuachi modern Delta. ③ in different periods of the outer edge of the delta formed in different periods of the shore outside the dam - lagoon system. The Caofeidian sand island is the leading edge of the mid-Holocene delta Shaba, hit the net post shijiutuo lump on Shaba the leading edge Shaba history of early delta formed snake Kong, lanterns Shop, sand Lake Linkou and shagang, and other The dam is the leading edge of the delta of the history of the late Shaba, old river bottom, wreck doors Shaba is the leading edge of the latest Delta Shaba. Due to the influence of topography and hydrological conditions, many tidal inlet suitable for the construction of port development in the evolution of the Delta. ④ are many factors that lead to the change of the Luan River Delta, the main factors of tectonic activity, hydro-meteorological, sea-level fluctuations and human activities. Tectonic activity in the active phase of the tectonic movement, the basic motivation, other role as influencing factors promote or weakened river diversion and Delta development, thus affecting the evolution of the delta. Quiet period of tectonic activity, the original structure is the basis of the diversion of the river, and climatic factors play a leading role in the Luan river diversions and Delta development since the Holocene hydrological factors and human activities to promote or weakening trend of Luan River diversion, thereby affecting Delta changes and development. ⑤ As the Luanhekou weak tidal estuary, Delta is the main product of rivers and waves together delta erosion dynamic change depends on how much Luan River sediment sources. Strong changes in flow and sediment load lead role in Delta's battalion force significant changes. ⑥ found Delta development and evolution of the unpredictability of enhanced the Luan River Delta region tectonic activity characteristics, climate, weather characteristics and comprehensive study of the extent of human activity interventions. Luan River Delta regional advantages are obvious, the evolution of the Delta provides a broad space for the local economic development, relying on the port construction, oil and gas resource development on the basis of environmental protection, to promote the local economy and the economic development of Hebei Province.

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CLC: > Astronomy,Earth Sciences > Geophysics > Hydrological Sciences (water sector physics) > Land hydrology, hydrology (water phenomenology ) > Estuaries,deltas
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