Modeling the trophic response of a shallow lake following external load reduction: a case study

2000 ◽  
Vol 27 (2) ◽  
pp. 819-822
Author(s):  
A. Clement
GeoJournal ◽  
1987 ◽  
Vol 14 (3) ◽  
Author(s):  
T.N. Filatova ◽  
A.E. J�ni ◽  
V.I. Kvon
Keyword(s):  

Limnology ◽  
2007 ◽  
Vol 8 (2) ◽  
pp. 155-160 ◽  
Author(s):  
Serena Zaccara ◽  
Alessandro Canziani ◽  
Valeria Roella ◽  
Giuseppe Crosa

CATENA ◽  
2015 ◽  
Vol 126 ◽  
pp. 1-10 ◽  
Author(s):  
Izabela Zawiska ◽  
Michał Słowiński ◽  
Alexander Correa-Metrio ◽  
Milena Obremska ◽  
Tomi Luoto ◽  
...  

Retos ◽  
2015 ◽  
pp. 168-171
Author(s):  
Andrés Vargas Fuentes ◽  
Iban Urkiza Ibaibarriaga ◽  
Susana María Gil Orozko

The aim of the study was to observe the evolution of the external load of a soccer player who just joined the team after a recovered injury.13 male football players of a soccer team (20.9 ± 1.7 years, 1.80 ± 0.05 m, 73.1 ± 5.3 kg) belonging to the 2nd division B participated in this study. After 30 days off following a hamstring injury a player started to train with the team. The next week his injury relapsed, so he had to stop training for another week. Finally he was re-incorporated to the team. External load was measured in the injured player (P) and the rest of the players of the team (T) using GPS devices (GPSport) during week 1 and week 2. The variables measured were: distance at high intensity (DHI; >14 km/h) and distance at sprint (S; >24 km/h). Besides, the number of times they entered the different acceleration rates: (Acc) 1 (0-2 m/s/s), Acc2 (2-3 m/s/s) and Acc3 (3-5 m/s/s) and the number of times they entered the different deceleration rates: (Dec) 1 (0-2 m/s/s), Dec2 (2-3 m/s/s) and Dec3 (3-5 m/s/s). During the first week of training, P performed longer DHI and S than T. Moreover, P performed higher acc1, acc2, acc3, dec1, dec2 and dec3 than T. In contrast, during the second week, T performed longer DHI and S than P. However, P performed higher acc1, acc2, acc3, and dec1 than T. However, similar values were found in dec2 and dec3 in P and T. It was observed that the acc and dec in both weeks indicated a higher peripheral muscle work in P. Therefore, according to the nature of the injury a modification or even avoidance of certain exercises should be considered especially those exercises that directly impact on the repaired muscles.Key words: Hamstring, injury, incorporation and football.Resumen: El objetivo del estudio fue observar la evolución de la carga externa de un futbolista al reincorporarse al equipo después de una lesión. 13 jugadores masculinos de fútbol (20.9±1.7 años, 1.80±0.05 m, 73.1±5.3 kg) de un equipo de 2ª división B participaron en este estudio. Después de 30 días de baja tras una lesión en el músculo isquiotibial un jugador comenzó a entrenar con el equipo. Tras la primera semana, la lesion recidivó y se volvió a incorporar al equipo tras una semana de baja. La carga externa se evaluó en el jugador lesionado (P) y en el resto de los jugadores del equipo (T) utilizando dispositivos GPS (GPSport). Las variables medidas fueron: Distancia a alta intensidad (DHI; >14 km/h) y la distancia a Sprint (S; >24 km/h). Además, el número de aceleraciones (Acc) 1 (0-2 m/s/s), Acc2 (2-3 m/s/s) y Acc3 (3-5 m/s/s) y deceleraciones (Dec) 1 (0-2 m/s/s), Dec2 (2-3 m/s/s) y dec3 (3-5 m/s/s). Durante la primera semana de entrenamiento P realizó mayor DHI y S que T. Por otra parte, P realizó mayor cantidad de acc1, acc2, acc3, dec1, dec2 y dec3 que T. Por el contrario, durante la segunda semana, T realizó mayor DHI y S que P. Sin embargo, P realizó mayor cantidad de acc1, acc2, acc3 y dec1 que T. Valores similares fueron encontrados en dec2 y dec3 en P y T. En ambas semanas se observó un mayor trabajo muscular periférico en el jugador lesionado. Por lo tanto, de acuerdo con la naturaleza de la lesión una modificación o incluso la exclusión de ciertos ejercicios deben ser considerados; especialmente aquellos ejercicios que impactan directamente en los músculos recuperadosPalabras claves: Isquiotibial, lesión, incorporación y fútbol.


2017 ◽  
Vol 29 (4) ◽  
pp. 1009-1017 ◽  
Author(s):  
XIAO Wei ◽  
◽  
FU Jingru ◽  
WANG Wei ◽  
WEN Xuefa ◽  
...  

2019 ◽  
Vol 11 (19) ◽  
pp. 5347 ◽  
Author(s):  
Xueping Gao ◽  
Shiyao Zhang ◽  
Bowen Sun ◽  
Na Li ◽  
Yongpeng Liu ◽  
...  

Large shallow reservoirs control flooding, supply water, and protect the ecological environment, which are vital functions for societal development. As the largest artificial plain reservoir in China, Suyahu Reservoir is suffering from significant sedimentation and water quality deterioration in recent years. A three-dimensional (3-D) hydrodynamic and water quality model was developed based on the Environmental Fluid Dynamic Code (EFDC). The model was applied to seven scenarios for evaluating the response of in-reservoir hydrodynamics and water quality to the restoration measures, including expansion and sediment dredging project, external load reduction, and inflow regulation. The results show that: (1) the expansion and sediment dredging project has no notable improvement on the water quality of the reservoir; (2) the external load reduction can significantly improve the water quality of the reservoir; and (3) the optimal inflow condition occurred when the flows of Ru River’s two inlets were evenly distributed, and the hydrodynamics and water quality were best improved. Moreover, the increasing water exchange rate could not cause the same water quality improvement, showing that it may be unreliable to evaluate the effects of restoration measures using a single indicator. This study can provide useful information for developing and implementing effective restoration measures in large shallow reservoirs.


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