Gain and retain - On the efficiency of modified agricultural drainage ponds for pesticide retention

Willkommen, Sandra; Lange, Jens; Pfannerstill, Matthias; Fohrer, Nicola; Ulrich, Uta

doi:10.1016/j.scitotenv.2022.155405

Cited by 3 publications

(5 citation statements)

References 37 publications

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“…Similar to other water bodies, LSWB calculations are subject to limitations and uncertainties (Golus & Bajkiewicz‐Grabowska, 2017; Mohajerani et al, 2021). For the water balance of agricultural ponds, Willkommen et al (2022) performed a detailed uncertainty estimation including all components like precipitation, evaporation, drainage in‐ and outflow, and groundwater in‐ and exfiltration. The overall uncertainty of gain and losses was estimated to be ca.…”

Section: Discussionmentioning

confidence: 99%

“…The water balance was calculated in daily intervals for each LSWB with the following equations (Willkommen et al, 2022). Equation was used for LSWB‐S, and Equation was used for LSWB‐K.

{Vol}_{normald} = {Vol}_{d - 1} + \sum_{i = 1}^{n} {((), P goodbreak- E goodbreak+ {In}_{GW / normalP} goodbreak- {Out}_{GW / normalP})}_{i}

{Vol}_{normald} = {Vol}_{d - 1} + \sum_{i = 1}^{n} {((), P goodbreak- E goodbreak+ {In}_{GW / normalP} goodbreak- {Out}_{GW / normalP} goodbreak+ {Dr}_{In} goodbreak- {Dr}_{Out})}_{i}

Vol d (m 3 d −1 ) describes the water volume at the end of the calculated day and Vol d−1 (m 3 day −1 ) at the previous day.…”

Section: Methodsmentioning

confidence: 99%

“…To calculate the inflow (In, m 3 day −1 ) and outflow (Out, m 3 day −1 ) of the shallow groundwater, Equations and were applied (Busch et al, 1993). The approach of Busch et al (1993) (also Willkommen et al, 2022; ZALF, 2011) allows the calculation of groundwater inflows and outflows due to changing gradients between groundwater and LSWB levels. These potential differences, which are described by the term

\frac{water_{level}_{GW / normalP}^{2}}{2} - \frac{water_{level}_{LSWB}^{2}}{2}

, are based on the Girinski potential (Girinskii, 1946a, 1946b) for unconfined groundwater flow conditions.…”

Section: Methodsmentioning

confidence: 99%

“…The water balance was calculated in daily intervals for each LSWB with the following equations (Willkommen et al, 2022). Equation 3was used for LSWB-S, and Equation 4was used for LSWB-K.…”

Section: Water Balance Calculationmentioning

confidence: 99%

“…Hydrological tracers are well‐established tools to investigate aquatic environments (Leibundgut et al, 2009). They are commonly used to investigate water flow, solute transport and various processes in water bodies (Lange et al, 2011; Ulrich et al, 2019; Willkommen et al, 2022). To accurately understand hydrological pathways, stable isotopes of water, namely deuterium and oxygen‐18, are often applied since they are part of the water molecule and almost ideal tracers (Leibundgut et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

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A multi‐method approach for the identification and quantification of water balance components of two lentic small water bodies

Loose,

Lange,

Budde

et al. 2024

Hydrological Processes

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The protection of the globally widespread lentic small water bodies (LSWB) must be based on detailed knowledge about their hydrological connectivity and water balance. The study aimed to identify and quantify water balance components as well as surface‐groundwater interaction of two LSWB in a characteristic lowland region with a combination of different methods. This includes the collection of hydrological data and the use of bromide and water stable isotopes (δ2H and δ18O) as tracers. With their help, mixing models were established, and daily water balances were assessed. The results show a strong bidirectional interaction of both LSWB systems with shallow groundwater. Bromide and stable isotope tracers allowed for the identification of the most relevant in‐ and outflow sources and pathways. Thereby, isotope data revealed isotopic enrichment typical for open‐water bodies and only minor precipitation inputs mainly relevant at the end of the dry season. Water balance calculations suggested accentuated seasonal dynamics that were strongly influenced by shallow groundwater, which represented large inputs into both LSWB. By that, different phases could be identified, with high inflow rates in winter and spring and decreasing fluxes in summer. In one LSWB, a drainage system was found to have a major impact next to the shallow groundwater interaction. The findings of this research provide detailed insights into the influence and importance of shallow groundwater for LSWB in lowland regions. This impacts the diffuse input of agricultural pollutants into these ecologically important landscape features.

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Section: Discussionmentioning

confidence: 99%

“…The water balance was calculated in daily intervals for each LSWB with the following equations (Willkommen et al, 2022). Equation was used for LSWB‐S, and Equation was used for LSWB‐K.

{Vol}_{normald} = {Vol}_{d - 1} + \sum_{i = 1}^{n} {((), P goodbreak- E goodbreak+ {In}_{GW / normalP} goodbreak- {Out}_{GW / normalP})}_{i}

{Vol}_{normald} = {Vol}_{d - 1} + \sum_{i = 1}^{n} {((), P goodbreak- E goodbreak+ {In}_{GW / normalP} goodbreak- {Out}_{GW / normalP} goodbreak+ {Dr}_{In} goodbreak- {Dr}_{Out})}_{i}

Vol d (m 3 d −1 ) describes the water volume at the end of the calculated day and Vol d−1 (m 3 day −1 ) at the previous day.…”

Section: Methodsmentioning

confidence: 99%

\frac{water_{level}_{GW / normalP}^{2}}{2} - \frac{water_{level}_{LSWB}^{2}}{2}

, are based on the Girinski potential (Girinskii, 1946a, 1946b) for unconfined groundwater flow conditions.…”

Section: Methodsmentioning

confidence: 99%

“…The water balance was calculated in daily intervals for each LSWB with the following equations (Willkommen et al, 2022). Equation 3was used for LSWB-S, and Equation 4was used for LSWB-K.…”

Section: Water Balance Calculationmentioning

confidence: 99%