紫色丘陵区典型小流域暴雨径流氮磷迁移过程与通量
文献类型：期刊论文
| 作者 | 朱波 ; 唐家良
|
| 刊名 | 水利学报
 |
| 出版日期 | 2009-06-15 |
| 卷号 | 40期号:6页码:659-666 |
| 关键词 | 迁移过程 小流域 暴雨径流 氮磷 初期冲刷效应 壤中流 流域 |
| 其他题名 | Transportation processes and loss fluxes of nitrogen an d phosphorous through storm runof in a typical small watershed in the hilly area of purple soil |
| 合作状况 | 其它 |
| 中文摘要 | 对紫色丘陵区盐亭截流小流域2007年3次暴雨径流的全过程进行了连续监测,测定了径流量及降雨—径流过程中氮、磷的形态、浓度与通量变化。结果表明,N、P各形态浓度变化曲线与流量曲线趋势大致相同,总氮(TN)浓度迅速达到峰值后缓慢下降,而后期又略呈上升趋势,硝态氮(NN)浓度变化总体呈上升趋势,颗粒态氮(PN)与颗粒态磷(PP)浓度在径流过程中迅速达到峰值后陡然下降,氨态氮(AN)及磷酸盐(PO43--P)含量较低且波动较小。暴雨径流前期氮素迁移以PN为主,主要来源于地表径流,受降雨强度控制。后期以NN为主,来源于土壤硝酸盐随壤中流淋失。磷素主要以地表径流迁移的PP为主。暴雨径流导致的N、P流失负荷巨大,说明初期冲刷效应明显。 |
| 英文摘要 | Abstract：To understand the hydrological pathways of nitrogen and phosphorus loss in the hilly area of purple soil is crucial for non-point source pollution contro1．W ater flows，concentrations and fluxes of N and P through rainfall—runof in three storm rain events were monitored at a small watershed in the central Sichuan Basin，China，in 2007．The results showed that the N and P concentrations responded with discharge flow．Total nitrogen (TN)concentration increased sharply up to the peak，then decreased slowly，and followed a rising trend at the end stage of the runof；while nitrate—nitrogen(NN)increased during the observation period．The concentrations of particulate nitrogen (PN)and phosphorus(PP) rised sharply an d then followed by a rapid decline．Th e low concentrations and small variations were observed in ammonium—nitrogen(AN)and phosphate phosphorous(PO]一一P)．The PN transported by surface flow was dominated in the early periods of storm runof，while NN became dominant in the late period，suggesting the importance of subsurface flow transporting of nitrate．Th e PP caused by surface flow was the main form of phosphorus in storm runof．The loss loads of N and P in storm runof were high，with mean loads of TN and TP equal to 4．8 and 0．7 g。m～respectively．Based on a(MW)curve， the loads of PN，TP and PP mostly distributed in the early portion of storm -runof，showing first flush effects was important and particulate N and P were tran sported with overland flow．By contrast，NN loads mainly in the late stage of storm -runof，implying NN was transported by subsurface flow． |
| 资助信息 | 国家自然科学基金(40571093);中国科学院西部计划项目(KZCX2-XB2-07);中科院山地所2007年青年种子基金 |
| 语种 | 中文 |
| 公开日期 | 2010-08-30 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/1714]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 推荐引用方式 GB/T 7714 | 朱波,唐家良. 紫色丘陵区典型小流域暴雨径流氮磷迁移过程与通量[J]. 水利学报,2009,40(6):659-666. |
| APA | 朱波,&唐家良.(2009).紫色丘陵区典型小流域暴雨径流氮磷迁移过程与通量.水利学报,40(6),659-666. |
| MLA | 朱波,et al."紫色丘陵区典型小流域暴雨径流氮磷迁移过程与通量".水利学报 40.6(2009):659-666. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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