Mercury in Aquatic Organisms of the Ebro River Basin

2010 ◽  
pp. 239-258 ◽  
Author(s):  
Luis Carrasco ◽  
Josep M. Bayona ◽  
Sergi Díez
Keyword(s):  
River Basin ◽  
Aquatic Organisms ◽  
Ebro River

scholarly journals Spatial Modeling of Rainfall Patterns over the Ebro River Basin Using Multifractality and Non-Parametric Statistical Techniques

Water ◽  
2015 ◽  
Vol 7 (11) ◽  
pp. 6204-6227 ◽  
Author(s):  
José Valencia ◽  
Ana Tarquis ◽  
Antonio Saa ◽  
María Villeta ◽  
José Gascó
Keyword(s):  
River Basin ◽  
Spatial Modeling ◽  
Statistical Techniques ◽  
Ebro River ◽  
Rainfall Patterns ◽  
Non Parametric

Voluntary Agreement for River Regime Restoration Services in the Ebro River Basin (Spain)

2015 ◽  
pp. 365-378
Author(s):  
Carlos M. Gómez ◽  
Gonzalo Delacámara ◽  
C. Dionisio Pérez-Blanco ◽  
Marta Rodríguez
Keyword(s):  
River Basin ◽  
Voluntary Agreement ◽  
Ebro River

scholarly journals Spatialized N budgets in a large agricultural Mediterranean watershed: high loading and low transfer

2012 ◽  
Vol 9 (1) ◽  
pp. 57-70 ◽  
Author(s):  
L. Lassaletta ◽  
E. Romero ◽  
G. Billen ◽  
J. Garnier ◽  
H. García-Gómez ◽  
...  
Keyword(s):  
River Basin ◽  
Management Practices ◽  
N Fertilization ◽  
Irrigated Agriculture ◽  
N Budget ◽  
Ebro River ◽  
N Retention ◽  
Management Measures ◽  
Mediterranean Regions ◽  
Food And Feed

Abstract. Despite the particular management practices and climate characteristics of the Mediterranean regions, the literature dealing with N budgets in large catchments subjected to Mediterranean conditions is scarce. The present study aims to deepen our knowledge on the N cycle within the Ebro River Basin (NE Spain) by means of two different approaches: (1) calculating a global N budget in the Ebro River Basin and (2) calculating a series of detailed regional budgets at higher geographical resolution. N inputs and outputs were spatialized by creating a map based on the most detailed information available. Fluvial and atmospheric N export was estimated together with N retention. The Ebro River Basin annually receives a relatively high amount of new N (5118 kg N km−2 yr−1), mostly in the form of synthetic fertilizers (50%). Although it is a highly productive catchment, the net N input as food and feed import is also high (33%). Only 8% of this N is finally exported to the delta zone. Several territorial units characterized by different predominant uses (rainfed agriculture, irrigated agriculture and pastures) have differentiated N dynamics. However, due to the high density of irrigation channels and reservoirs that characterize Mediterranean catchments, N retention is very high in all of them (median value, 91%). These results indicate that problems of eutrophication due to N delivery in the coastal area may not be too severe but that high N retention values may instead lead to problems within the catchment, such as pollution of aquifers and rivers, as well as high atmospheric emissions. The most promising management measures are those devoted to reducing agricultural surpluses through a better balanced N fertilization.

scholarly journals Additional records of non-native freshwater fishes for the Ebro River basin (Spain)

2010 ◽  
Vol 5 (3) ◽  
pp. 291-296 ◽  
Author(s):  
Rafael Miranda ◽  
Pedro Leunda ◽  
Javier Oscoz ◽  
Antonio Vilches ◽  
Ibon Tobes ◽  
...  
Keyword(s):  
River Basin ◽  
Freshwater Fishes ◽  
Ebro River

scholarly journals Effects of Opened and Closed Spillway Operations of a Large Tropical Hydroelectric Dam on the Water Quality of the Downstream River

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Fiona-Annilow Wera ◽  
Teck-Yee Ling ◽  
Lee Nyanti ◽  
Siong-Fong Sim ◽  
Jongkar Grinang
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Aquatic Organisms ◽  
Quality Parameters ◽  
Regulated River ◽  
Land Uses ◽  
Hydroelectric Dam ◽  
Water Ph ◽  
The Impact

Water quality downstream of a hydroelectric dam is potentially affected by dam operations and other land uses in the river basin. Previous short-distance studies below the large Bakun Dam indicated poorer water quality during closed spillway. However, the extent of the impact is still unknown. Such knowledge is essential for mitigating the impact of the dam. Thus, the objectives of this study were to determine the water quality up to a distance of 210 km under two spillway operations, namely, closed and opened spillways, and also to determine the changes in water quality from the predam condition. Physicochemical parameters were measured at 15 stations along the Rajang River. Results of this preliminary study indicated that there were significant differences in eight out of nine water quality parameters between opened and closed spillway operations with opened spillway showing better water quality. During closed spillway, as we approached the dam, there was an increasing acidity and a decreasing oxygen content. Furthermore, as the water flows downstream, the unhealthy DO level (<5 mg/L) extended up to 165 km and the linear model showed an increasing DO rate of 0.09 mg/L per km. With opened spillway, DO decreased exponentially from 9.74 mg/L towards the downstream direction to 7.67 mg/L. The increasing turbidity and TSS in the downstream direction indicate contributions from erosion due to other land uses. The river is polluted with organics as indicated by COD of Class IV or V with sources from the dam and the activities in the river basin. Compared to the predam condition, the regulated river is less turbid but warmer and higher in ammonia. Closed spillway led to lower DO and acidic water. However, opened spillway water pH and DO were similar to those in the predam condition. Thus, it is recommended that DO be consistently high enough for the health of sensitive aquatic organisms downstream.

scholarly journals Iron chlorosis in the Ebro River basin, Spain

1992 ◽  
Vol 15 (10) ◽  
pp. 1971-1981 ◽  
Author(s):  
Manuel Sanz ◽  
Javier Cavero ◽  
Javier Abadía
Keyword(s):  
River Basin ◽  
Iron Chlorosis ◽  
Ebro River

scholarly journals Effects of water re-allocation in the Ebro river basin: A multiregional input-output and geographical analysis

2019 ◽  
Vol 241 ◽  
pp. 645-657 ◽  
Author(s):  
Miguel A. Almazán-Gómez ◽  
Rosa Duarte ◽  
Raquel Langarita ◽  
Julio Sánchez-Chóliz
Keyword(s):  
River Basin ◽  
Input Output ◽  
Ebro River ◽  
Geographical Analysis

scholarly journals A methodology to classify irrigated areas: Application to the central Ebro River Basin in Aragón (Spain)

2020 ◽  
Vol 241 ◽  
pp. 106365 ◽  
Author(s):  
N. Zapata ◽  
E. Playán ◽  
R. Castillo ◽  
Y. Gimeno ◽  
I. Oliván ◽  
...  
Keyword(s):  
River Basin ◽  
Ebro River
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