Based on data from the middle Yellow River basin, a wind-water two-phase mechanism for erosion and sediment-producing processes has been found. By using this mechanism, the extremely strong erosion and sediment yield ...Based on data from the middle Yellow River basin, a wind-water two-phase mechanism for erosion and sediment-producing processes has been found. By using this mechanism, the extremely strong erosion and sediment yield in the study area can be better explained. The operation of wind and water forces is different in different seasons within a year. During winter and spring, strong wind blows large quantities of eolian sand to gullies and river channels, which are temporally stored there. During the next summer, rainstorms cause runoff that contains much fine loessic material and acts as a powerful force to carry the previously prepared coarse material. As a result, hyperconcentrated flows occur, resulting in high-intensity erosion and sediment yield.展开更多
为了促进区域经济发展、改善黄河流域生态环境质量,基于景区兴趣点(point of interest,POI)数据,采用核密度估计、标准差椭圆、地理联系率和空间叠加分析等方法,探究黄河流域中游170个3A级及以上(以下简称“3A级以上”)山地景区的空间...为了促进区域经济发展、改善黄河流域生态环境质量,基于景区兴趣点(point of interest,POI)数据,采用核密度估计、标准差椭圆、地理联系率和空间叠加分析等方法,探究黄河流域中游170个3A级及以上(以下简称“3A级以上”)山地景区的空间分布特点及影响因素.结果表明:①黄河流域中游3A级以上山地景区集中分布在晋、陕、豫三省,景区密度大.3A级山地景区高密度区主要分布在豫北、豫南、晋东南;4A级山地景区呈向右旋转90°的“Y”型分布;5A级山地景区主要集中在晋、陕、豫交界处,组团状分布,由东北向西南展布.②自然地理环境方面,3A级以上山地景区主要分布在海拔300~1200 m处,坡度为15°~45°,偏南坡.河流水系、植被指数、空气质量对景区分布的影响效果显著.③社会经济环境方面,交通区位、固定资产投资、旅游收入和文化遗产禀赋是景区发展的重要影响因素.展开更多
文摘Based on data from the middle Yellow River basin, a wind-water two-phase mechanism for erosion and sediment-producing processes has been found. By using this mechanism, the extremely strong erosion and sediment yield in the study area can be better explained. The operation of wind and water forces is different in different seasons within a year. During winter and spring, strong wind blows large quantities of eolian sand to gullies and river channels, which are temporally stored there. During the next summer, rainstorms cause runoff that contains much fine loessic material and acts as a powerful force to carry the previously prepared coarse material. As a result, hyperconcentrated flows occur, resulting in high-intensity erosion and sediment yield.
文摘为了促进区域经济发展、改善黄河流域生态环境质量,基于景区兴趣点(point of interest,POI)数据,采用核密度估计、标准差椭圆、地理联系率和空间叠加分析等方法,探究黄河流域中游170个3A级及以上(以下简称“3A级以上”)山地景区的空间分布特点及影响因素.结果表明:①黄河流域中游3A级以上山地景区集中分布在晋、陕、豫三省,景区密度大.3A级山地景区高密度区主要分布在豫北、豫南、晋东南;4A级山地景区呈向右旋转90°的“Y”型分布;5A级山地景区主要集中在晋、陕、豫交界处,组团状分布,由东北向西南展布.②自然地理环境方面,3A级以上山地景区主要分布在海拔300~1200 m处,坡度为15°~45°,偏南坡.河流水系、植被指数、空气质量对景区分布的影响效果显著.③社会经济环境方面,交通区位、固定资产投资、旅游收入和文化遗产禀赋是景区发展的重要影响因素.
