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新西兰大陆位于两块趋于靠拢的地壳版块的分界线上.因此,它具有丰富的地质和火山活动历史,特别是在南岛一带,随时都会发生的冰川运动强烈地改变着地貌.基于这种远古背景,实际侵蚀和潜在的自然侵蚀是垦殖的阶段,虽然时间短暂但影响巨大.最终的结果是:目前的侵蚀特性同世界任何地方相比是一致的,侵蚀速度一样快.高山地区的过度侵蚀和随后发生的沉积物顺河向低洼平原的输入是水土保持中引起极为关注的主要问题.几位研究者在南岛的一些主要流域研究了沉积源的数量和范围.该项研究在新西兰首次确定了侵蚀与可能导致侵蚀的参数之间的关系,为将来土地管理政策提供依据.该研究区域位于南岛东部主要地带Orari集水区上游,/550平方公里.陡坡、草地、土质为硬砂岩/泥质板岩.高度差从200米到2000米.年平均降雨量1000毫米.土地主要用于大面积的牛羊放牧.就侵蚀、沉积物运输和洪水问题而言,该流域是这一地带中具有同类侵蚀的许多小流域的代表.这项研究寻求描述集水区的物理特性;确定低处水系沉积源的范围;确定每一主要次集水区对沉积物供应的相对严重性;确定对每一沉积源的处理类型和处理实例;并确认与沉积源分布相关联的有因果关系的点参数.
The New Zealand mainland is located on the demarcation line between the two adjacent crustal plates, so it has a rich history of geology and volcanism, and the glacial movement that occurs at any time, particularly in the South Island, strongly changes the landscape. The ancient background, physical erosion, and potential natural erosion are the stages of cultivation, albeit with a short period of time, but have a huge impact. The end result is that the current erosion characteristics are consistent with those in any part of the world and erosion is as fast as possible. Erosion and Subsequent Sediment Entry Along the river to low-lying plains is a major concern in soil conservation, with several investigators investigating the number and extent of sedimentary sources in some of the South Island’s main basins. The study was conducted in New Zealand For the first time, the relationship between erosion and the potential erosion-causing parameters was established to provide a basis for future land management policies.The study area is located 550km2 upstream of the Orari catchment, a major strip in the eastern South Island, with steep slopes, grasslands and hard soil Sandstone / shale slate. Height difference from 200 meters to 2000 meters. The average annual rainfall of 1000 mm. Land is mainly used for large areas of cattle and sheep Much of this catchment is representative of many small watersheds of similar erosivity in this zone in terms of erosion, sediment transport and flooding, and this study seeks to describe the physical characteristics of catchment areas; Range; determine the relative severity of sediment supply for each major sub-catchment; determine the type of treatment and treatment for each deposition source; and identify the causal point parameters associated with the deposition source distribution.