An R code for event analysis of concentration-discharge relationships and hysteresis

This R code uses joint time series of concentration and discharge to (1) separate discharge events and store them in a data frame (events_h) and (2) analyse C-Q relationships including hysteresis, derive metrics describing these and store them in a data frame (eve.des).
The R code is provided as TXT and as R-file.
The code is written by Qing Zhan, Rémi Dupas, Camille Minaudo and Andreas Musolff.

This code is used and further descriped in this paper:
A. Musolff, Q. Zhan, R. Dupas, C. Minaudo, J. H. Fleckenstein, M. Rode, J. Dehaspe & K. Rinke (2021)
Spatial and Temporal Variability in Concentration-Discharge Relationships at the Event Scale.
Water Resourcers Research Volume 57, Issue 10
https://doi.org/10.1029/2020WR029442

本R代码利用浓度与流量的联合时间序列，实现两大功能：(1) 分离流量事件并将其存储至数据框`events_h`中；(2) 分析浓度-流量（Concentration-Discharge, C-Q）关系（包含滞后效应（hysteresis）），推导表征此类关系的指标，并将结果存储至数据框`eve.des`中。
本R代码以TXT文本文件与R脚本文件两种格式提供。
本代码由Qing Zhan、Rémi Dupas、Camille Minaudo与Andreas Musolff编写。

本代码已在以下论文中得到应用并进一步阐释：
A. Musolff、Q. Zhan、R. Dupas、C. Minaudo、J. H. Fleckenstein、M. Rode、J. Dehaspe 及 K. Rinke (2021)
《事件尺度下浓度-流量关系的时空变异性》
《水资源研究》第57卷第10期
https://doi.org/10.1029/2020WR029442