Changes in concentration–discharge regression parameters due to coal mining and reclamation activities / Changements dans les paramètres de régression entre concentration et débit, causés par l’exploitation minière de charbon et des activités de reconversion
Changes in concentration–discharge regression parameters due to coal mining and reclamation activities / Changements dans les paramètres de régression entre concentration et débit, causés par l’exploitation minière de charbon et des activités de reconversion
复制标题
煤炭开采和复垦活动导致的浓度-排放回归参数的变化 / 煤炭开采和复垦活动导致的浓度-排放回归参数的变化 / 煤炭开采和复垦活动导致的浓度-排放回归参数的变化
DOI：
10.1623/hysj.50.1.155.56335
复制
发表时间：
2005
影响因子：
3.5
通讯作者：
James Bonta
中科院分区：
文献类型：
--
作者：
James Bonta
摘要
摘要评估采矿和围垦的影响，以及设计减少河道中化学品负荷的管理做法，需要了解不断变化的水文条件以及不断变化的源和向溪水中释放化学品的速率。评估这些影响的一种简单方法是将水流历时曲线与地表水化学浓度(C)和瞬时排放量(Q)之间的回归关系结合起来。然而，关于开采和复垦流域的流域尺度对回归关系的影响却知之甚少。这些影响在俄亥俄州三个进行露天开采煤炭的小型试验性排水盆地上进行了评估。比较了自然/未受干扰条件、采矿和复垦造成的土地扰动、未完全复垦以及围垦流域最终状况的回归参数变化。回归分析共使用了36种成分的5047份实验室分析。在429个回归中，153个(36%)具有统计学意义。了解回归参数的变化很重要，因为回归提供了有关开采和复垦的流域中化学成分的释放和供应速度的信息。浓度和负荷的持续时间曲线可以用这些回归和流量-持续时间曲线来建立，以估计在扰动的不同阶段浓度和负荷被超过的时间百分比。这项研究评估了36种化学成分、两种采矿方法、三种复垦实践和三种不同的地质背景下，煤层开采和复垦活动导致的回归关系的变化。
Abstract
Abstract Assessment of the impacts of mining and reclamation, and design of management practices to reduce chemical loads in stream channels, require knowledge of changing hydrological conditions and of changing sources and rates of release of chemicals into stream waters. One simple method for evaluating these impacts is to combine flow duration curves with regression relations between surface-water chemical concentrations (C) and instantaneous discharge (Q). However, little is known regarding the drainage basin-scale effects of mining and reclaiming drainage basins on regression relations. These effects were assessed on three small experimental drainage basins in Ohio subjected to surface mining for coal. Comparisons were made between regression parameter changes for natural/undisturbed conditions, land disturbances caused by mining and reclamation, incomplete reclamation, and the final condition of the reclaimed drainage basins. Regression analysis used a total of 5047 laboratory analyses of 36 constituents. Of 429 regressions, 153 (36%) were statistically significant. Knowledge of changes in regression parameters is important because regressions supply information on the rate of release and supply of chemical constituents in mined and reclaimed drainage basins. Duration curves of concentration and loads can be constructed using these regressions with flow–duration curves to give estimates of the percentage of time that concentrations and loads are exceeded during different phases of disturbance. This study assessed the changes in regression relations due to mining coal seams and reclamation activities for 36 chemical constituents, two mining methods, three reclamation practices and three distinct geologic settings.