赣北第四纪红壤区侵蚀性降雨强度与雨量标准的确定

降雨是土壤侵蚀的主要动力因子,侵蚀性降雨标准的获取是计算降雨侵蚀力的重要环节;目前,红壤区侵蚀性降雨标准不一致,需要进一步研究。利用2001—2009年的1359场降雨数据,对赣北第四纪红壤区不同下垫面的侵蚀性降雨标准进行研究,得出结论如下:1)不同下垫面满足拟定侵蚀性降雨标准的数据序列长度存在明显差异,满足拟定侵蚀性降雨标准的数据序列长度可以反映水土保持措施从实施到发挥稳定效益所需的年限;2)具有水土保持措施的下垫面能够有效提高侵蚀性雨量标准,柑橘+前埂后沟梯壁植草水平梯田的第5小区侵蚀性雨量标准为16.2mm,比地表裸露小区的11.4mm提高42.1%;3)对于没有水土保持措施或稳定性高的...

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Published in农业工程学报 Vol. 29; no. 11; pp. 100 - 106
Main Author 汪邦稳 方少文 宋月君 杨洁
Format Journal Article
LanguageChinese
Published 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,南昌,330029 2013
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ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2013.11.013

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Summary:降雨是土壤侵蚀的主要动力因子,侵蚀性降雨标准的获取是计算降雨侵蚀力的重要环节;目前,红壤区侵蚀性降雨标准不一致,需要进一步研究。利用2001—2009年的1359场降雨数据,对赣北第四纪红壤区不同下垫面的侵蚀性降雨标准进行研究,得出结论如下:1)不同下垫面满足拟定侵蚀性降雨标准的数据序列长度存在明显差异,满足拟定侵蚀性降雨标准的数据序列长度可以反映水土保持措施从实施到发挥稳定效益所需的年限;2)具有水土保持措施的下垫面能够有效提高侵蚀性雨量标准,柑橘+前埂后沟梯壁植草水平梯田的第5小区侵蚀性雨量标准为16.2mm,比地表裸露小区的11.4mm提高42.1%;3)对于没有水土保持措施或稳定性高的水土保持措施下垫面,宜采用时段侵蚀性雨强标准;对于稳定性低的水土保持措施下垫面,宜采用侵蚀性雨量标准。该研究为区域水土保持规划提供参考。
Bibliography:11-2047/S
runoff; sediments; erosion; erosive rainfall standard; soil and water conservation; Quaternary Red Soil area
Wang Bangwen, Fang Shaowen, Song Yuejun, Yang Jie (Jiangxi Institute of Soil and Water Conservation, Key Laboratory Soil Erosion and Prevention, Nanchang 330029, China)
Rainfall is regarded as one of the principal dynamic factors of soil erosion. The attainment of an erosive rainfall standard is acknowledged as the essential part in calculating rainfall erosivity. At present, results of research for an erosive rainfall standard are diverse in the red soil area. Hence, it deserves to be studied to a further extent. On the basis of the observation of runoff plots, the standard of erosive rainfall was comparatively analyzed under different soil and water conservation measures employing five types of underlying surface in the Quatenary red earth area of Northern Jiangxi province, including bare surface, citrus with cross-slope cultivation, citrus with clean cultivation, citrus with bahia grass cover
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2013.11.013