输变电线路塔基区不同植被模式下边坡水土流失特征OA
Soil erosion characteristics of slopes under different vegetation patterns in tower foundation areas of power transmission and transformation lines
[目的]明确山地丘陵区输变电工程塔基区水土流失特征及水沙关系,减少水土流失对地区生态环境的影响.[方法]以辽西山丘区输变电线路工程中侵蚀最为严重的塔基区为研究对象,采用模拟放水试验以裸坡(CK)为对照,分别设计流量为5,10,15,20 L/min,研究冰草、鹅绒藤、冰草+沙棘坡面(BC,ER,BG)的径流产沙特征及水沙关系.[结果](1)不同放水流量条件下径流率均呈先快速增大后呈稳定波动的变化趋势,其中BG坡面对于塔基区径流的阻滞效果最好.(2)放水流量在5～15 L/min时坡面侵蚀速率相对稳定,波动变化并不明显,随放水流量增大,塔基区坡面侵蚀速率明显提高,总体呈"多峰多谷"的变化趋势,其中BC,BG对坡面的减蚀效果最显著.(3)除CK坡面外,植被配置坡面侵蚀速率与径流率之间呈幂函数的变化关系(R2=0.60～0.84,N=76).总体上,塔基坡面有无植被防护措施,都表现为水大沙大的变化趋势.[结论]冰草与沙棘混种(BG)能有效阻滞径流并显著减少侵蚀,且植被坡面侵蚀速率与径流率呈幂函数关系,表明植被措施能有效调控塔基区水沙关系.
[Objective]This study aims to clarify the characteristics of soil erosion and the water-sediment relationship in the tower foundation areas of power transmission and transformation projects in hilly regions,and to mitigate the impact of soil erosion on the regional ecological environment.[Methods]The tower foundation area with the most severe erosion in the power transmission and transformation line project in the hilly region of western Liaoning was taken as the research object.Simulated runoff experiments were conducted using bare slopes(CK)as the control.Flow rates were set at 5,10,15 and 20 L/min to investigate the runoff-sediment yield characteristics and water-sediment relationship of slopes vegetated with Agropyron cristatum(BC),Cynanchum chinense(ER),and Agropyron cristatum+Hippophae rhamnoides(BG).[Results](1)Under different flow conditions,the runoff rate initially increased rapidly and then stabilized with fluctuations,with the BG slope showing the best blocking effect on runoff in the tower foundation area.(2)When the flow rate was 5～15 L/min,the slope erosion rate remained relatively stable with minor fluctuations.As the flow rate increased,the slope erosion rate in the tower foundation area significantly increased,showing an overall"multi-peak and multi-valley"trend.The BC and BG slopes demonstrated the most significant erosion reduction effects.(3)Except for the CK slope,there was a power function relationship between erosion rate and runoff rate on vegetated slopes(R2=0.60～0.84,N=76).In general,irrespective of vegetation protection measures on the tower foundation slopes,an overall trend of higher runoff leading to higher sediment yield was observed.[Conclusion]The Agropyron cristatum+Hippophae rhamnoides(BG)can effectively block runoff and significantly reduce erosion.Furthermore,the erosion rate on vegetated slopes shows a power function relationship with runoff rate,indicating that vegetation measures can effectively regulate the water-sediment relationship in the tower foundation areas.
吕铭;王振浩;张琦;焦勇;许志勇;张吉;计霖
国网辽宁省电力有限公司经济技术研究院,沈阳 110015国网辽宁省电力有限公司,沈阳 110015国网辽宁省电力有限公司经济技术研究院,沈阳 110015国网辽宁省电力有限公司,沈阳 110015国网辽宁省电力有限公司,沈阳 110015国网辽宁省电力有限公司经济技术研究院,沈阳 110015国网辽宁省电力有限公司经济技术研究院,沈阳 110015
农业科技
辽西山丘区塔基边坡原位放水冲刷输变电线路工程
hilly region of western Liaoningtower foundation slopein-situ flow scouringpower transmission and transformation line project
《水土保持研究》 2026 (2)
35-41,7
国网辽宁省电力有限公司经济技术研究院"山丘区输变电工程侵蚀环境及水土流失特征研究"(SGLNJY00SJJS2310050)
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