首页> 外文期刊>Applied Geochemistry: Journal of the International Association of Geochemistry and Cosmochemistry >Hydrogeochemistry approach to the identification of flow components under the descending limb conditions of a hydrograph (Corbeira stream, Spain)
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Hydrogeochemistry approach to the identification of flow components under the descending limb conditions of a hydrograph (Corbeira stream, Spain)

机译:水文地球化学方法识别水文垂线下降条件下的水流成分(西班牙Corbeira溪流)

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This paper presents a method based on hydrogeochemical signatures for the identification of flow components, from the descending limb to the baseflow, without the direct support of hydrographs. The proposed model was built using chemical analysis of waters from a small agro-forestry catchment having a temperate climate. The sampling was performed every 15. days at the Corbeira stream outlet, from 2004 to 2008. A statistical approach was used with particulate P/dissolved P (PP/DP) values, resulting in a global histogram, within which mini-Gaussian distributions were highlighted. The mean of each group of highlighted PP/DP values, as well as all other selected analytical parameters, were calculated and plotted in Cartesian diagrams. The results showed the hydrogeochemical signatures of the Corbeira stream in the descending limb to baseflow conditions. Scatterplots of the migration of particulate matter showed linear regressions forming α≠. 0 to the X-axis, while dissolved compounds showed parallel linearity (α=0) in relation to the same axis. Deflections in the linear behavior point to significant changes in the chemical concentrations from different types of aqueous inputs. Flow components in the descending limb show distinct ranges along the X-axis: the mean PP/DP values. The ranges varying from 3.3 to 2.0 correspond to its upper phases from 2.0 to 0.9 suggests mixtures between inflows and from 0.9 to 0.3 denote subsurface flow dominance. Finally, PP/DP < 0.3 indicates exclusive baseflow conditions. These intervals are specific to the Corbeira catchment as a consequence of its geographical characteristics and should be numerically different from the proposed method if applied to other catchments. However, this method remains valid for application in other small catchments as the PP/DP ranges in the descending limb are defined by the relative behavior between the linear correlations from the hydrogeochemical concentrations plotted in a Cartesian diagram.
机译:本文提出了一种基于水文地球化学特征的方法,用于识别从下降肢到基流的流量分量,而无需水位图的直接支持。所提出的模型是使用对具有温带气候的小型农林业流域的水进行化学分析而建立的。从2004年到2008年,每15天在Corbeira溪流出口进行一次采样。采用统计方法对颗粒物P /溶解P(PP / DP)值进行了统计,得出了整体直方图,在该图中直方图为高斯分布突出显示。计算每组突出显示的PP / DP值的平均值以及所有其他选定的分析参数,并将其绘制在笛卡尔图中。结果表明,Corbeira溪流在下肢到基流条件下的水文地球化学特征。颗粒物迁移的散点图显示形成α≠的线性回归。 X轴为0,而溶解的化合物相对于同一轴显示平行线性(α= 0)。线性行为的偏离表明来自不同类型的水输入的化学浓度的显着变化。下降肢中的流量分量沿X轴显示出不同的范围:平均PP / DP值。从3.3到2.0的范围对应于其上位相,从2.0到0.9表示入流之间的混合物,而从0.9到0.3则表示地下流动占优势。最后,PP / DP <0.3表示排他性基本流条件。由于其地理特征,这些间隔特定于Corbeira流域,如果应用于其他流域,则在数值上应与建议的方法有所不同。但是,该方法仍然适用于其他小流域,因为下肢的PP / DP范围由笛卡尔图中绘制的水文地球化学浓度的线性相关之间的相对行为来定义。

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