---
_id: '12854'
abstract:
- lang: eng
text: Assessing nutrient loading and processing is crucial for water quality management
in lakes and reservoirs. Quantifying and reducing external nutrient inputs in
these systems remains a significant challenge. The difficulty arises from low
monitoring frequencies of the highly dynamic external inputs and the limited availability
of measures to reduce diffuse source loading. One option for the latter is the
use of pre-dams, i.e. small impoundments at the inflow points into reservoirs,
designed to retain nutrients by algal uptake and sedimentation. This study analyzes
long-term (ranging from 8 to 22 years) nutrient and discharge time series for
nine German pre-dams to assess their retention capacity. For that, we (i) quantified
nutrient loading using four different mathematical methods, (ii) derived their
retention efficiencies, and (iii) identified environmental factors determining
the retention of nitrogen (N), phosphorus (P), and silica (Si). We show that retention
of soluble reactive phosphorus (SRP) (43.6 %) and total phosphorus (TP) (39.9
%) is far higher than for nitrate (NO3) (15.3 %) and Si (15.9 %). The retention
efficiency for SRP and TP was higher during the warm seasons because of higher
algal nutrient uptake and thus higher nutrient sedimentation. Mixed effects models
documented a significant positive effect of the pre-dams' hydraulic residence
time (HRT) on retention efficiency. Pre-dams provide substantial service in retaining
nutrients and help to protect downstream waterbodies from nutrient inputs. They
provide effective measures for trapping nutrients including those originating
from non-point sources.
article_number: '122864'
author:
- first_name: Taynara
full_name: Fernandes, Taynara
last_name: Fernandes
- first_name: Tom
full_name: Shatwell, Tom
id: '86424'
last_name: Shatwell
orcid: 0000-0002-4520-7916
- first_name: Martin
full_name: Schultze, Martin
last_name: Schultze
- first_name: Chenxi
full_name: Mi, Chenxi
last_name: Mi
- first_name: Maria
full_name: Determann, Maria
last_name: Determann
- first_name: Karsten
full_name: Rinke, Karsten
last_name: Rinke
citation:
ama: 'Fernandes T, Shatwell T, Schultze M, Mi C, Determann M, Rinke K. How efficient
are pre-dams as reservoir guardians? A long-term study on nutrient retention.
Water research : a journal of the International Water Association. 2024;272.
doi:10.1016/j.watres.2024.122864'
apa: 'Fernandes, T., Shatwell, T., Schultze, M., Mi, C., Determann, M., & Rinke,
K. (2024). How efficient are pre-dams as reservoir guardians? A long-term study
on nutrient retention. Water Research : A Journal of the International Water
Association, 272, Article 122864. https://doi.org/10.1016/j.watres.2024.122864'
bjps: 'Fernandes T et al. (2024) How Efficient Are Pre-Dams as Reservoir
Guardians? A Long-Term Study on Nutrient Retention. Water research : a journal
of the International Water Association 272.'
chicago: 'Fernandes, Taynara, Tom Shatwell, Martin Schultze, Chenxi Mi, Maria Determann,
and Karsten Rinke. “How Efficient Are Pre-Dams as Reservoir Guardians? A Long-Term
Study on Nutrient Retention.” Water Research : A Journal of the International
Water Association 272 (2024). https://doi.org/10.1016/j.watres.2024.122864.'
chicago-de: 'Fernandes, Taynara, Tom Shatwell, Martin Schultze, Chenxi Mi, Maria
Determann und Karsten Rinke. 2024. How efficient are pre-dams as reservoir guardians?
A long-term study on nutrient retention. Water research : a journal of the
International Water Association 272. doi:10.1016/j.watres.2024.122864,
.'
din1505-2-1: 'Fernandes, Taynara ;
Shatwell, Tom ; Schultze,
Martin ; Mi, Chenxi ; Determann, Maria ; Rinke,
Karsten: How efficient are pre-dams as reservoir guardians? A long-term
study on nutrient retention. In: Water research : a journal of the International
Water Association Bd. 272. Amsterdam [u.a.], Elsevier BV (2024)'
havard: 'T. Fernandes, T. Shatwell, M. Schultze, C. Mi, M. Determann, K. Rinke,
How efficient are pre-dams as reservoir guardians? A long-term study on nutrient
retention, Water Research : A Journal of the International Water Association.
272 (2024).'
ieee: 'T. Fernandes, T. Shatwell, M. Schultze, C. Mi, M. Determann, and K. Rinke,
“How efficient are pre-dams as reservoir guardians? A long-term study on nutrient
retention,” Water research : a journal of the International Water Association,
vol. 272, Art. no. 122864, 2024, doi: 10.1016/j.watres.2024.122864.'
mla: 'Fernandes, Taynara, et al. “How Efficient Are Pre-Dams as Reservoir Guardians?
A Long-Term Study on Nutrient Retention.” Water Research : A Journal of the
International Water Association, vol. 272, 122864, 2024, https://doi.org/10.1016/j.watres.2024.122864.'
short: 'T. Fernandes, T. Shatwell, M. Schultze, C. Mi, M. Determann, K. Rinke, Water
Research : A Journal of the International Water Association 272 (2024).'
ufg: 'Fernandes, Taynara u. a.: How efficient are pre-dams as reservoir guardians?
A long-term study on nutrient retention, in: Water research : a journal of
the International Water Association 272 (2024).'
van: 'Fernandes T, Shatwell T, Schultze M, Mi C, Determann M, Rinke K. How efficient
are pre-dams as reservoir guardians? A long-term study on nutrient retention.
Water research : a journal of the International Water Association. 2024;272.'
date_created: 2025-04-24T06:36:16Z
date_updated: 2025-06-24T14:12:42Z
department:
- _id: DEP8000
- _id: DEP8022
doi: 10.1016/j.watres.2024.122864
external_id:
isi:
- '001377992000001'
pmid:
- '39647312'
intvolume: ' 272'
isi: '1'
keyword:
- Nutrient load calculation
- Phosphorus
- Nitrogen
- Silica
- Retention efficiency
- Lakes
language:
- iso: eng
place: Amsterdam [u.a.]
pmid: '1'
publication: 'Water research : a journal of the International Water Association'
publication_identifier:
eissn:
- 1879-2448
issn:
- 0043-1354
publication_status: published
publisher: Elsevier BV
status: public
title: How efficient are pre-dams as reservoir guardians? A long-term study on nutrient
retention
type: scientific_journal_article
user_id: '83781'
volume: 272
year: '2024'
...
---
_id: '12825'
abstract:
- lang: eng
text: Agriculture is a major contributor to nitrate groundwater contamination. Hence,
farmers are demanded to reduce the environmental impact but simultaneously must
provide sufficient food products. One important building block for this "sustainable
intensification" are appropriate cropping strategies. The potential of modified
crop rotations was evaluated in a high-yielding environment in Northern Germany.
Therefore, in five consecutive growing seasons (2016/2017 - 2020/2021) three crop
rotations were grown in a field trial and compared with respect to agronomic (cereal
unit), economic (gross margin) and environmental (N surplus) parameters. A standard
crop rotation, typical for the region of the study, was compared with rearranged
and augmented crop rotations. Therefore, crops with a high autumnal N uptake (winter
oilseed rape and catch crops) were grown after crops with typically high soil
mineral N (SMN) amounts after harvest (faba bean and winter oilseed rape). Due
to the change of preceding and subsequent crops, an increased N transfer was supposed
to prevent N from leaching and a lower N fertilizer demand of the subsequent crop
was expected. On average, the modified crop rotations achieved significantly higher
cereal units (9.3 and 10.8 t center dot ha -1) compared to the local crop rotation
(8.5 t center dot ha -1). The gross margin of the local crop rotation was 1474
euro center dot ha- 1 and the other crop rotations maintained (1443 euro center
dot ha -1) or significantly increased (1572 euro center dot ha -1) this value,
respectively. The local crop rotation had a N surplus of 47 kg N center dot ha
-1. In contrast, the N surplus of the modified crop rotations was significantly
lower (10 and 28 kg N center dot ha -1). In summary, the results showed that a
thoughtful rearrangement of crop rotations is an appropriate measure to simultaneously
improve yields and gross margins with less unfavorable environmental impacts.
article_number: '126644'
author:
- first_name: Maren
full_name: Rose, Maren
last_name: Rose
- first_name: Ingo
full_name: Pahlmann, Ingo
id: '76515'
last_name: Pahlmann
- first_name: Henning
full_name: Kage, Henning
last_name: Kage
citation:
ama: Rose M, Pahlmann I, Kage H. Modified crop rotations for a sustainable intensification?
A case study in a high-yielding environment with recurrent nitrogen surplus. European
Journal of Agronomy. 2022;142. doi:10.1016/j.eja.2022.126644
apa: Rose, M., Pahlmann, I., & Kage, H. (2022). Modified crop rotations for
a sustainable intensification? A case study in a high-yielding environment with
recurrent nitrogen surplus. European Journal of Agronomy, 142, Article
126644. https://doi.org/10.1016/j.eja.2022.126644
bjps: Rose M, Pahlmann I and Kage H (2022) Modified Crop Rotations for a
Sustainable Intensification? A Case Study in a High-Yielding Environment with
Recurrent Nitrogen Surplus. European Journal of Agronomy 142.
chicago: Rose, Maren, Ingo Pahlmann, and Henning Kage. “Modified Crop Rotations
for a Sustainable Intensification? A Case Study in a High-Yielding Environment
with Recurrent Nitrogen Surplus.” European Journal of Agronomy 142 (2022).
https://doi.org/10.1016/j.eja.2022.126644.
chicago-de: Rose, Maren, Ingo Pahlmann und Henning Kage. 2022. Modified crop rotations
for a sustainable intensification? A case study in a high-yielding environment
with recurrent nitrogen surplus. European Journal of Agronomy 142. doi:10.1016/j.eja.2022.126644,
.
din1505-2-1: 'Rose, Maren ; Pahlmann, Ingo ; Kage,
Henning: Modified crop rotations for a sustainable intensification? A case
study in a high-yielding environment with recurrent nitrogen surplus. In: European
Journal of Agronomy Bd. 142. Amsterdam [u.a.], Elsevier BV (2022)'
havard: M. Rose, I. Pahlmann, H. Kage, Modified crop rotations for a sustainable
intensification? A case study in a high-yielding environment with recurrent nitrogen
surplus, European Journal of Agronomy. 142 (2022).
ieee: 'M. Rose, I. Pahlmann, and H. Kage, “Modified crop rotations for a sustainable
intensification? A case study in a high-yielding environment with recurrent nitrogen
surplus,” European Journal of Agronomy, vol. 142, Art. no. 126644, 2022,
doi: 10.1016/j.eja.2022.126644.'
mla: Rose, Maren, et al. “Modified Crop Rotations for a Sustainable Intensification?
A Case Study in a High-Yielding Environment with Recurrent Nitrogen Surplus.”
European Journal of Agronomy, vol. 142, 126644, 2022, https://doi.org/10.1016/j.eja.2022.126644.
short: M. Rose, I. Pahlmann, H. Kage, European Journal of Agronomy 142 (2022).
ufg: 'Rose, Maren/Pahlmann, Ingo/Kage, Henning: Modified crop rotations for
a sustainable intensification? A case study in a high-yielding environment with
recurrent nitrogen surplus, in: European Journal of Agronomy 142 (2022).'
van: Rose M, Pahlmann I, Kage H. Modified crop rotations for a sustainable intensification?
A case study in a high-yielding environment with recurrent nitrogen surplus. European
Journal of Agronomy. 2022;142.
date_created: 2025-04-22T13:48:00Z
date_updated: 2025-06-25T13:11:04Z
department:
- _id: DEP8000
doi: 10.1016/j.eja.2022.126644
external_id:
isi:
- '000876352700009'
intvolume: ' 142'
isi: '1'
keyword:
- Crop rotation
- Sustainable intensification
- Cereal unit
- Gross margin
- Nitrogen surplus
- Effective net nitrogen mineralization
language:
- iso: eng
place: Amsterdam [u.a.]
publication: European Journal of Agronomy
publication_identifier:
eissn:
- 1873-7331
issn:
- 1161-0301
publication_status: published
publisher: Elsevier BV
status: public
title: Modified crop rotations for a sustainable intensification? A case study in
a high-yielding environment with recurrent nitrogen surplus
type: scientific_journal_article
user_id: '83781'
volume: 142
year: '2022'
...