浙江水利科技
浙江水利科技
절강수리과기
ZHEJIANG SHUILI KEJI
2014年
5期
8-12
,共5页
董占地%吉祖稳%王党伟%胡海华
董佔地%吉祖穩%王黨偉%鬍海華
동점지%길조은%왕당위%호해화
黄河%宁蒙河段%平滩流量
黃河%寧矇河段%平灘流量
황하%저몽하단%평탄류량
Yellow River%Ningmeng reach%bankfull flow
采用黄河上游宁蒙河段各水文站1965-2004年实测资料，分析了宁蒙河段平滩流量的变化过程，表明宁蒙河段平滩流量随时间呈现减小的趋势，特别是1986年龙羊峡水库运用后减小更为明显，已由20世纪60年代中期的3600～5800 m3／s减小到2004年的1100～3600 m3／s ，尤以内蒙古河段的三湖河口站最为严重，从1986年的4100 m3／s左右减小到2004年的1100 m3／s左右，内蒙古河段平滩流量减小幅度要大于宁夏河段，主河槽出现明显萎缩。文中给出了宁蒙河段历年平滩流量与年和汛期来水量的响应关系，具有随年和汛期来水量增加而增大的规律。进一步分析表明，当年来水量为200亿m3或汛期来水量为80亿m3时，宁夏河段和内蒙古河段的平滩流量分别约为3100，2850 m3／s；当年来水量为300亿m3或汛期来水量为170亿m3时，宁夏河段和内蒙古河段的平滩流量分别约为4300，4000 m3／s。分析结果可为宁蒙河段河道进一步整治的研究提供基础。
採用黃河上遊寧矇河段各水文站1965-2004年實測資料，分析瞭寧矇河段平灘流量的變化過程，錶明寧矇河段平灘流量隨時間呈現減小的趨勢，特彆是1986年龍羊峽水庫運用後減小更為明顯，已由20世紀60年代中期的3600～5800 m3／s減小到2004年的1100～3600 m3／s ，尤以內矇古河段的三湖河口站最為嚴重，從1986年的4100 m3／s左右減小到2004年的1100 m3／s左右，內矇古河段平灘流量減小幅度要大于寧夏河段，主河槽齣現明顯萎縮。文中給齣瞭寧矇河段歷年平灘流量與年和汛期來水量的響應關繫，具有隨年和汛期來水量增加而增大的規律。進一步分析錶明，噹年來水量為200億m3或汛期來水量為80億m3時，寧夏河段和內矇古河段的平灘流量分彆約為3100，2850 m3／s；噹年來水量為300億m3或汛期來水量為170億m3時，寧夏河段和內矇古河段的平灘流量分彆約為4300，4000 m3／s。分析結果可為寧矇河段河道進一步整治的研究提供基礎。
채용황하상유저몽하단각수문참1965-2004년실측자료，분석료저몽하단평탄류량적변화과정，표명저몽하단평탄류량수시간정현감소적추세，특별시1986년룡양협수고운용후감소경위명현，이유20세기60년대중기적3600～5800 m3／s감소도2004년적1100～3600 m3／s ，우이내몽고하단적삼호하구참최위엄중，종1986년적4100 m3／s좌우감소도2004년적1100 m3／s좌우，내몽고하단평탄류량감소폭도요대우저하하단，주하조출현명현위축。문중급출료저몽하단력년평탄류량여년화신기래수량적향응관계，구유수년화신기래수량증가이증대적규률。진일보분석표명，당년래수량위200억m3혹신기래수량위80억m3시，저하하단화내몽고하단적평탄류량분별약위3100，2850 m3／s；당년래수량위300억m3혹신기래수량위170억m3시，저하하단화내몽고하단적평탄류량분별약위4300，4000 m3／s。분석결과가위저몽하단하도진일보정치적연구제공기출。
By analyzing the filed data of flow and sediment process in Ningmeng Reach during 1965-2004 , the bankfull discharge in this river was investigated and the result showed that the bankfull discharge decreased with time during this period since the river cross-section shrank , the bankfull discharge of the whole reach was 3 600~5 800 m3/s in the middle 1960's while it decreased to 1 100~3 600 m3/s in 2004 , and bankfull discharge decrease of Neimenggu reach are more than that of the Ningxia reach . Especially , after building of the Longyangxia Dam in 1986 , bankfull discharge at Sanhehukou hydrologic station has been decreased from 4 100 m3/s in 1986 to 1 100 m3/s in 2004 . Relationship between bankfull discharge and runoff of flood season was analyzed and the result showed that the former augmented with the increasing of the latter . Besides it is found that this relationship was not only influenced by runoff but also by flood process . When annual runoff is 20 billion m3 or runoff in flood season is 8 billion m3 , bankfull discharge of Ningxia reach and Neimenggu reach was about 3 100 m3/s and 2 850 m3/s , while they were 4 300 m3/s and 4 000 m3/s when annual runoff was 30 billion m3 or runoff in flood season was 17 billion m3 . The results of this paper will be profit for river regulation in Ningmeng reach .
