The Yellow River cut through Sanmenxia Gorge and discharged into the sea via the North China Plain in 150 ka BP; since then, around 86 000 × 108 t sediment has been transported passing Sanmenxia Gorge. Based on l...The Yellow River cut through Sanmenxia Gorge and discharged into the sea via the North China Plain in 150 ka BP; since then, around 86 000 × 108 t sediment has been transported passing Sanmenxia Gorge. Based on land use and land cover changes in Loess Plateau and other available evidence, an estimate of the Yellow River sediment budget is presented here： about 72% of the sedimentary material was trapped in the North China Plain and the remainder（i.e., 26%） escaped to the sea. At the present stage, 〈 0.2×108 t/a suspended sediment of the Yellow River enter the northern Yellow Sea. The transport pattern is determined mainly by the shelf current system. Annually 0.2×108–0.3×108 t of suspended particles are carried to the East China Sea; the materials are derived mainly from coastal and subaqueous delta erosion associated with the abandoned Yellow River on the Jiangsu coast. Since 1972, the lower Yellow River started to have a situation of continuous no-flow. During 1996–2000, the annual water flow and sediment discharge are only 19%, as compared with normal years（i.e., average for 1950–1979）. In response to global warming and increase of water diversion from the Yellow River for industrial and urban use, the sediment flux of the Yellow River to the sea will most likely remain small in the next two to three decades.展开更多
黄河于150 ka BP切穿三门峡,东流入海.黄河泥沙90%来自黄土高原.黄土高原土地利用和植被的变化对黄河输沙有决定性的影响.15万年以来,黄河进入华北平原的泥沙约70 000×108 t,其中10 ka BP以前占80%.10 ka BP以后的输沙量中,最后104...黄河于150 ka BP切穿三门峡,东流入海.黄河泥沙90%来自黄土高原.黄土高原土地利用和植被的变化对黄河输沙有决定性的影响.15万年以来,黄河进入华北平原的泥沙约70 000×108 t,其中10 ka BP以前占80%.10 ka BP以后的输沙量中,最后1040年黄土高原滥垦时期占60%.黄河泥沙的归宿,建造华北大平原占73%,流入海洋占26%.现在,黄河每年流入北黄海的泥沙不足0.2×108 t,其输运主要受海洋环流系统的影响.现在黄海每年向东海输运悬浮沉积物0.2×108～0.3×108 t,主要为废黄河三角洲及水下三角洲受侵蚀再悬浮的黄河泥沙.1996-2000年黄河下游连年断流,利津站的年径流量和输沙量只有1950-1979年30年平均的19%左右.今后20～30年内,由于气候变暖、工业、城市等引黄水量增加,黄河的入海泥沙量仍将偏少.展开更多
文摘The Yellow River cut through Sanmenxia Gorge and discharged into the sea via the North China Plain in 150 ka BP; since then, around 86 000 × 108 t sediment has been transported passing Sanmenxia Gorge. Based on land use and land cover changes in Loess Plateau and other available evidence, an estimate of the Yellow River sediment budget is presented here： about 72% of the sedimentary material was trapped in the North China Plain and the remainder（i.e., 26%） escaped to the sea. At the present stage, 〈 0.2×108 t/a suspended sediment of the Yellow River enter the northern Yellow Sea. The transport pattern is determined mainly by the shelf current system. Annually 0.2×108–0.3×108 t of suspended particles are carried to the East China Sea; the materials are derived mainly from coastal and subaqueous delta erosion associated with the abandoned Yellow River on the Jiangsu coast. Since 1972, the lower Yellow River started to have a situation of continuous no-flow. During 1996–2000, the annual water flow and sediment discharge are only 19%, as compared with normal years（i.e., average for 1950–1979）. In response to global warming and increase of water diversion from the Yellow River for industrial and urban use, the sediment flux of the Yellow River to the sea will most likely remain small in the next two to three decades.
文摘黄河于150 ka BP切穿三门峡,东流入海.黄河泥沙90%来自黄土高原.黄土高原土地利用和植被的变化对黄河输沙有决定性的影响.15万年以来,黄河进入华北平原的泥沙约70 000×108 t,其中10 ka BP以前占80%.10 ka BP以后的输沙量中,最后1040年黄土高原滥垦时期占60%.黄河泥沙的归宿,建造华北大平原占73%,流入海洋占26%.现在,黄河每年流入北黄海的泥沙不足0.2×108 t,其输运主要受海洋环流系统的影响.现在黄海每年向东海输运悬浮沉积物0.2×108～0.3×108 t,主要为废黄河三角洲及水下三角洲受侵蚀再悬浮的黄河泥沙.1996-2000年黄河下游连年断流,利津站的年径流量和输沙量只有1950-1979年30年平均的19%左右.今后20～30年内,由于气候变暖、工业、城市等引黄水量增加,黄河的入海泥沙量仍将偏少.
