Sediment oxygen demand in the Arroyo Colorado river
Sediment oxygen demand in the Arroyo Colorado river
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DOI：
10.1111/j.1752-1688.2003.tb04382.x
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发表时间：
2003-04-01
影响因子：
2.4
通讯作者：
Osborn, GS
中科院分区：
文献类型：
--
作者：
Matlock, MD;Kasprzak, KR;Osborn, GS
由于粪便大肠菌群和溶解氧 (DO) 较低，科罗拉多州阿罗约河下游历来未能满足美国清洁水法第 303(b) 款的要求。据报道，鱼类死亡，特别是在潮汐交汇处。德克萨斯州哈林根港的蜜蜂沉积物 (SOD) 的需氧量通常有两种状态 - 扩散限制 SOD (SOD) 和潜在 SOD (pSOD)，当沉积物因流量增加或其他扰动而重新悬浮时表示。本研究的目的是原位测量阿罗约科罗拉多河中的 SOD，异位估计 pSOD，并评估 SOD 与沉积环境之间的关系。我们在 3 个采样事件中测量了阿罗约科罗拉多河中多达 8 个地点的 SOD 和 pSOD。我们根据改进的 Rosgen 地貌指数确定了样本点，以实现河床稳定。沉积物沉积潜力高的地点 SOD 含量较高。站点之间SOD的平均值为0.62 g/m(2)/天（标准偏差0.38 g/m(2)/天），范围为0.13至1.2 g/m(2)/天。潜在的 SOD 值范围从低至 19.2 到高达 2,779 g/m(3) 沉积物/天。潜在的 SOD 可以作为河流系统中再悬浮沉积物中 SOD 可能影响的指标。
The lower reaches of the Arroyo Colorado have historically failed to meet their use under subsection 303(b) of the U.S. Clean Water Act due to fecal coliform bacteria and low dissolved oxygen (DO). Fish kills, especially at the tidal confluence at the In reported. Oxygen demand from Port of Harlingen, Texas, have bee sediment (SOD) for a river typically has two states - diffusion limited SOD (SOD) and potential SOD (pSOD), expressed when sediment is resuspended through increased flow or other disturbances. The objective of this research was to measure SOD in the Arroyo Colorado River in situ, estimate pSOD ex situ, and evaluate the relationship between SOD and the depositional environment. We measured SOD and pSOD in the Arroyo Colorado River at up to eight sites over - three sampling events. We identified the sample sites based on a modified Rosgen geomorphic index for streambed stabilization. Sites with high sediment deposition potential had high SOD. The average values of SOD between sites were 0.62 g/m(2)/day (standard deviation 0.38 g/m(2)/day) and ranged from 0.13 to 1.2 g/m(2)/day. Potential SOD values ranged from as low as 19.2 to as high as 2,779 g/m(3) sediment/day. Potential SOD can serve as an indicator of the possible impact of SOD from resuspended sediment in stream systems.