scholarly journals Techniques for estimating the magnitude and frequency of peak flows on small streams in the binational U.S. and Canadian Lake of the Woods–Rainy River Basin upstream from Kenora, Ontario, Canada, based on data through water year 2013

2019 ◽  
Author(s):  
Christopher A. Sanocki ◽  
Tara Williams-Sether ◽  
Peter A. Steeves ◽  
Victoria G. Christensen
Keyword(s):  
River Basin ◽  
Peak Flows ◽  
Lake Of The Woods ◽  
Small Streams ◽  
Year 2013

scholarly journals Evaluation on non-stationarity assumption of annual maximum peak flows during 1956-2016 in the Huaihe River Basin

2018 ◽  
Vol 30 (4) ◽  
pp. 1123-1137
Author(s):  
SUN Peng ◽  
◽  
SUN Yuyan ◽  
ZHANG Qiang ◽  
YAO Rui ◽  
...  
Keyword(s):  
River Basin ◽  
Annual Maximum ◽  
Huaihe River Basin ◽  
Huaihe River ◽  
Peak Flows ◽  
Maximum Peak ◽  
The Huaihe River

scholarly journals Evaluation of Wheat Genotypes in Far Western Hills of Nepal

2015 ◽  
Vol 3 (3) ◽  
pp. 417-422
Author(s):  
Hari Kumar Prasai ◽  
Jiban Shrestha
Keyword(s):  
Grain Yield ◽  
River Basin ◽  
Treatment Effect ◽  
Agricultural Research ◽  
Research Station ◽  
Combined Analysis ◽  
Wheat Genotypes ◽  
Yield Trial ◽  
The Difference ◽  
Year 2013

Coordinated Varietal Trial (CVT) and Advanced Varietal Trial (AVT) of wheat were conducted at Regional Agricultural Research Station,Doti during the year 2012 and 2013. Microplot Yield Trial (MPYT) were conducted during the year 2013. Total 20 genotypes were includedin CVT experiment of both years. Although the difference in grain yield due to genotypes was not found significant during the year 2012, NL1144 recorded the highest grain yield (4309 kg/ha) followed by NL 1140 (4295 kg/ha) and NL 1147 (4165 kg/ha) respectively. But in the year2013, NL 1097 produced the highest grain yield (4641 kg/ha) followed by NL 1135 (4383 kg/ha) and NL 1164 (4283 kg/ha) respectively.Statistically, the difference in grain yield due to genotypes was not found significant in the year 2013. Combined analysis over years was alsocarried out. Out of 20, only 10 genotypes were included in the CVT experiment, which were found similar in both years. Genotypes NL 1097(4079 kg/ha), NL 1140 (3814 kg/ha) and NL 1093 (3773 kg/ha) were found high yielding genotypes for river basin agro-environment of farwestern hills. Statistically, effect of year in tested characters was found significant whereas treatment effect was observed non-significant.Similarly, 20 genotypes of wheat were included in AVT of wheat during the year 2012 and 2013. Out of the genotypes included in AVT duringthe year 2012, KISKADEE No.1recorded the highest grain yield (3824 kg/ha) followed by CHEWINK No. 1 (3643 kg/ha) and WK 2120 (3583kg/ha). Statistically all the tested characters except grain yield were found significantly different due to genotypes. But in the same experimentof the year 2013, WK 2412 genotype recorded the highest grain yield (4407 kg/ha) followed by WK 2411 (4329 kg/ha) and Munal-1 (4054kg/ha). Statistically the difference in grain yield and other tested characters were found significantly different. Due to dissimilarity in the testedgenotypes we could not carry-out the combined analysis over years. Total 30 genotypes were included in the MPYT experiment of the year2013. Genotype WK 2272 recorded the highest grain yield (6080 kg/ha) followed by the genotypes WK 2274 (5152 kg/ha) and WK 2278(4480 kg/ha) respectively. Statistically, the difference in grain yield and other tested characters were found significantly different due togenotypes.Int J Appl Sci Biotechnol, Vol 3(3): 417-422

Levels, sources and spatiotemporal variation of nutrients and micropollutants in small streams of a Mediterranean River basin

2011 ◽  
Vol 13 (11) ◽  
pp. 3064 ◽  
Author(s):  
Ioannis Karaouzas ◽  
Dimitra A. Lambropoulou ◽  
Nikolaos T. Skoulikidis ◽  
Triantafyllos A. Albanis
Keyword(s):  
River Basin ◽  
Spatiotemporal Variation ◽  
Mediterranean River ◽  
Small Streams

scholarly journals Examining the effects of urban agglomeration polders on flood events in Qinhuai River basin, China with HEC-HMS model

2017 ◽  
Vol 75 (9) ◽  
pp. 2130-2138 ◽  
Author(s):  
Yuqin Gao ◽  
Yu Yuan ◽  
Huaizhi Wang ◽  
Arthur R. Schmidt ◽  
Kexuan Wang ◽  
...  
Keyword(s):  
River Basin ◽  
Flood Control ◽  
Peak Flow ◽  
Urban Agglomeration ◽  
Flood Events ◽  
Peak Flows ◽  
Flood Volume ◽  
Control Pattern ◽  
The Impact ◽  
Qinhuai River

The urban agglomeration polders type of flood control pattern is a general flood control pattern in the eastern plain area and some of the secondary river basins in China. A HEC-HMS model of Qinhuai River basin based on the flood control pattern was established for simulating basin runoff, examining the impact of urban agglomeration polders on flood events, and estimating the effects of urbanization on hydrological processes of the urban agglomeration polders in Qinhuai River basin. The results indicate that the urban agglomeration polders could increase the peak flow and flood volume. The smaller the scale of the flood, the more significant the influence of the polder was to the flood volume. The distribution of the city circle polder has no obvious impact on the flood volume, but has effect on the peak flow. The closer the polder is to basin output, the smaller the influence it has on peak flows. As the level of urbanization gradually improving of city circle polder, flood volumes and peak flows gradually increase compared to those with the current level of urbanization (the impervious rate was 20%). The potential change in flood volume and peak flow with increasing impervious rate shows a linear relationship.

scholarly journals Assessment of impacts of climate change on surface water availability using coupled SWAT and WEAP models: case of upper Pangani River Basin, Tanzania

2018 ◽  
Vol 378 ◽  
pp. 23-27 ◽  
Author(s):  
Peter Kishiwa ◽  
Joel Nobert ◽  
Victor Kongo ◽  
Preksedis Ndomba
Keyword(s):  
Climate Change ◽  
Surface Water ◽  
River Basin ◽  
Water Use ◽  
Water Availability ◽  
Swat Model ◽  
Economic Activities ◽  
Peak Flows ◽  
Global Circulation Models ◽  
The Impact

Abstract. This study was designed to investigate the dynamics of current and future surface water availability for different water users in the upper Pangani River Basin under changing climate. A multi-tier modeling technique was used in the study, by coupling the Soil and Water Assessment Tool (SWAT) and Water Evaluation And Planning (WEAP) models, to simulate streamflows under climate change and assess scenarios of future water availability to different socio-economic activities by year 2060. Six common Global Circulation Models (GCMs) from WCRP-CMIP3 with emissions Scenario A2 were selected. These are HadCM3, HadGEM1, ECHAM5, MIROC3.2MED, GFDLCM2.1 and CSIROMK3. They were downscaled by using LARS-WG to station scale. The SWAT model was calibrated with observed data and utilized the LARS-WG outputs to generate future streamflows before being used as input to WEAP model to assess future water availability to different socio-economic activities. GCMs results show future rainfall increase in upper Pangani River Basin between 16–18 % in 2050s relative to 1980–1999 periods. Temperature is projected to increase by an average of 2 ∘C in 2050s, relative to baseline period. Long-term mean streamflows is expected to increase by approximately 10 %. However, future peak flows are estimated to be lower than the prevailing average peak flows. Nevertheless, the overall annual water demand in Pangani basin will increase from 1879.73 Mm3 at present (2011) to 3249.69 Mm3 in the future (2060s), resulting to unmet demand of 1673.8 Mm3 (51.5 %). The impact of future shortage will be more severe in irrigation where 71.12 % of its future demand will be unmet. Future water demands of Hydropower and Livestock will be unmet by 27.47 and 1.41 % respectively. However, future domestic water use will have no shortage. This calls for planning of current and future surface water use in the upper Pangani River Basin.

Pictographs of the San Luis Rey Basin, California

1954 ◽  
Vol 20 (01) ◽  
pp. 68-72 ◽  
Author(s):  
D. L. True
Keyword(s):  
River Basin ◽  
Forest Cover ◽  
San Diego County ◽  
Post Office ◽  
Aboriginal Population ◽  
Mountain Ranges ◽  
Total Runoff ◽  
San Luis ◽  
Small Streams ◽  
La Jolla

The San Luis Rey River flows westward across northern San Diego County, California. The area from Henshaw dam down to and including the Bonsall post office can be described as the central San Luis Rey River basin. It includes a little less than half of the total watershed area but contains many tributary streams and probably accounts for more than half of the total runoff. The area is mountainous and wooded or brush covered and is dissected by numerous small streams, many of which originate in the higher elevations of the Agua Tibia and Palomar mountain ranges. Ample water supplies and favorable thermal zones which belt the area, coupled with a heavy growth of forest cover along the streams, provided both vegetal and animal food supplies which in turn resulted in more than average aboriginal population. The heaviest concentrations of population were in the areas now known as Pauma Valley, Rincon, The Potrero, and the La Jolla area, all of which still have sizable Indian populations living on reservations. In historic times, the region was occupied by Indians of the Luisefio stock (Kroeber, 1925, p. 648).

scholarly journals The stream fish fauna from three regions of the Upper Paraná River basin

2015 ◽  
Vol 15 (2) ◽  
Author(s):  
Daniela Cristina Fagundes ◽  
Cecília Gontijo Leal ◽  
Débora Reis de Carvalho ◽  
Nara Tadini Junqueira ◽  
Francisco Langeani ◽  
...  
Keyword(s):  
River Basin ◽  
Fish Fauna ◽  
Paraná River ◽  
Stream Fish ◽  
Parana River ◽  
Small Streams ◽  
Upper Paraná River ◽  
Upper Paraná River Basin ◽  
Parana Basin ◽  
Paraná River Basin

This study aimed to conduct an inventory of fish assemblages in small streams that are tributaries of large reservoirs in three previously unstudied regions of the Upper Paraná River basin. We sampled 117 streams from 1st to 3rd order in Araguari (Nova Ponte hydropower plant reservoir), Paranaíba (São Simão reservoir) and Grande (Volta Grande reservoir) drainages. In total, 20,696 specimens belonging to 100 species, 53 genera, 20 families and six orders were collected. Of these, 11,530 specimens and 41 species were recorded in Araguari, whereas 17 were exclusive to this drainage. In Grande drainage, 3,537 individuals belonging to 41 species (11 exclusive) and in Paranaíba, 5,629 specimens and 67 species (38 exclusive) were sampled. The mean richness per stream was 6.7 for Grande, 9.0 for Araguari and 10.9 for Paranaíba drainage. The predominant orders were Characiformes, 48% of the total richness, and Siluriformes, 36%. Three species were diagnosed as new: Astyanax sp. 1 (Grande and Paranaíba), Astyanax sp. 2 and Astyanax sp. 3 (both from Araguari), all from scabripinnis group. Another three were considered potentially new: Characidium sp. 1, Characidium sp. 2 and Rhamdiopsis sp. Among all records, eight species are not native from the Paraná basin: the exotics Oreochromis niloticus and Tilapia rendalli and the allochtonous Cyphocharax gillii, Hoplerythrinus unitaeniatus, Knodus moenkhausii, Poecilia reticulata, Roeboides descalvadensis and Trichomycterus brasiliensis. This study fills part of the existing knowledge gap about fish from small streams of the Paraná basin. Inventories of the fish fauna from these low-order water courses are important because they highlight their biodiversity relevance, including a significant number of unknown species. Thus, this study contributes to a better knowledge of the stream fish fauna of the upper Paraná River basin, as well as contribute to the establishment of strategies for conservation of this important component of aquatic biodiversity.

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