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段 剑, 王凌云, 肖胜生.红砂岩侵蚀区典型水土流失治理模式减流减沙效应水资源与水工程学报[J].,2018,29(6):227-233
红砂岩侵蚀区典型水土流失治理模式减流减沙效应
Runoff and sediment control effects of typical soil and water conservation patterns in red sandstone erosion region
  
DOI:10.11705/j.issn.1672-643X.2018.06.35
中文关键词:  水土流失  治理模式  径流  侵蚀  径流小区  减流减沙效应  红砂岩
英文关键词:soil and water loss  governance pattern  runoff  soil erosion  runoff plot  runoff and sediment control effect  red sandstone
基金项目:江西省水利科技项目(KT201519、KT201417); 国家自然科学基金项目(41501026)
作者单位
段 剑, 王凌云, 肖胜生 (江西省水土保持科学研究院 江西省土壤侵蚀与防治重点实验室 江西 南昌 330029) 
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中文摘要:
      阐明小区尺度下不同水土流失治理模式的减流减沙效应,可为大尺度上的水土流失治理提供科学依据。以红砂岩侵蚀劣地为研究对象,采用野外径流小区长期定位试验的方法,分析自然降雨下典型水土流失治理模式的减流减沙效应及其对降雨要素、降雨雨型的响应规律。结果表明:试验观测期间,裸露地表径流系数为0.66,土壤侵蚀量为0.07 t/hm2,生态或经济开发治理后减流减沙效应均能达90%以上。地表裸露坡面产流产沙受降雨量、雨强影响显著,生态恢复模式降低了降雨要素对坡面产流产沙过程的影响,经济开发模式受降雨量影响显著。大雨强、短历时的降雨雨型是坡面产流产沙的主要雨型,对裸露坡面产流产沙的贡献将近50%,生态或经济开发治理后该雨型对产流产沙的贡献明显提高,增幅以经济开发模式大于生态恢复模式。因此,生态恢复和经济开发均是治理红砂岩水土流失的有效途径,应将生态恢复和经济开发治理相结合,使水土流失治理模式不仅具有水土保持功能,同时提升生态服务价值,促进当地的经济发展。
英文摘要:
      Understanding the runoff and sediment characteristics of different soil and water loss control patterns in small scale can provide science evidence for soil and water conservation in large scale. The runoff and sediment of red sandstone soil under typical soil and water conservation patterns in runoff plots were analyzed through in-situ natural rainfall observation. The runoff and sediment control effects and responses to rainfall elements and types were studied. The results showed that the runoff coefficient and soil erosion amount of bare land were 0.66 and 0.07 t/hm2 respectively during the field experiments. The ecological restoration and economic development modes led to more than 90% decrease in runoff and sediment. For bare land plot, the surface runoff and sediment amount had a significant positive relationship with rainfall depth and intensity, and with rainfall depth for economic development modes. Rainfall events with high intensities and short durations generated the highest surface runoff and soil erosion. The rainfall pattern contributed 50% to the total surface runoff and soil erosion for bare land, and the contribution rate significantly increase under ecological restoration and economic development modes. The growth of the economic development was greater than ecological restoration. Therefore, ecological restoration and economic development can be effective way to control soil erosion and water loss. Combination of the two aspect can improve ecosystem function and boost the local economic development.
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