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updated lumped, moved disaggregation from Rmd to md
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maseology committed Sep 4, 2024
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---
title: Automated hydrograph disaggregation
# author: Oak Ridges Moraine Groundwater Program
date: February, 2019
author: Oak Ridges Moraine Groundwater Program
output: html_document
---




# Hydrograph disaggregation

The hydrograph disaggregation algorithm is a means of categorizing the hydrograph into three primary constituent parts, namely:

1. the rising limb,
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---


# Hydrograph Separation

> "Division of a hydrograph into direct and groundwater runoff as a basis for subsequent analysis is known as *hydrograph separation* or *hydrograph analysis*. Since there is no real basis for distinguishing between direct and groundwater flow in a stream at any instant, and since definitions of these two components are relatively arbitrary, the method of separation is usually equally arbitrary." - Linsley et.al., 1975
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19 changes: 17 additions & 2 deletions lumped/index.md
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## Dawdy and O'Donnell

The Dawdy and O'Donnell model is the classic bucket type model.
The Dawdy and O'Donnell (1965) model is the classic bucket type model.

![](fig/DawdyODonnellModel.png)
![](fig/DawdyODonnell.png)

*Schematic diagram of the overall model of the hydrological cycle (from Dooge and O'Kane, 2003).*

## GR4J

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The Quinn model is the original land surface model used with TOPMODEL. When the Quinn model is used in isolation, a simple linear baseflow model is added to handle drainage.

Where the Quinn model differs is that it ca account for a shallow water table.

![](fig/Quinn.png)

*A simple version of the vertical storage element in the Quinn model. $S_i$ is the local gravity drainage storage deficit, $q_v$ is local recharge to the saturated zone and $\psi_o$ is the depth of the "capillary fringe" (Beven etal., 1995).*

$$
s_i = (\theta_s-\theta_\text{fc})(z_i-\psi_o)=\Delta\theta_1(z_i-\psi_o)
$$


## SIXPAR

Expand All @@ -96,10 +107,14 @@ Bergström, S., 1976. Development and application of a conceptual runoff model f

Bergström, S., 1992. The HBV model - its structure and applications. SMHI RH No 4. Norrköping. 35 pp.

Beven, K.J., R. Lamb, P.F. Quinn, R. Romanowicz, and J. Freer, 1995. TOPMODEL. In Singh V.P. editor, Computer Models of Watershed Hydrology. Water Resources Publications, Highland Ranch, CO: pp. 627—668.

Buytaert, W., and K. Beven, 2011. Models as multiple working hypotheses: hydrological simulation of tropical alpine. Hydrological Processes 25. pp. 1784–1799.

Dawdy, D.R., and T. O'Donnell, 1965. Mathematical Models of Catchment Behavior. Journal of Hydraulics Division, ASCE, Vol. 91, No. HY4: 123-137.

Dooge, J.C.I., and O'Kane, P., 2003. Deterministic Methods in Systems Hydrology: IHE Delft Lecture Note Series (1st ed.). CRC Press.

Duan, Q., S. Sorooshian, V. Gupta, 1992. Effective and Efficient Global Optimization for Conceptual Rainfall-Runoff Models. Water Resources Research 28(4): 1015-1031.

Gupta V.K., S. Sorooshian, 1983. Uniqueness and Observability of Conceptual Rainfall-Runoff Model Parameters: The Percolation Process Examined. Water Resources Research 19(1): 269-276.
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