scholarly journals Reconstruction of the Ob river runoff using meteorological data.

2020 ◽  
Vol 11 (5-2020) ◽  
pp. 17-27
Author(s):  
A.S. Bulavina ◽  
Keyword(s):  
River Flow ◽  
Meteorological Data ◽  
Water Discharge ◽  
Ob River ◽  
Long Term Trends ◽  
Annual Water ◽  
Interannual Fluctuations ◽  
Annual Water Discharge ◽  
Hydrometric Station

The connection of the Ob river flow variability with meteorological parameters in different parts of its catchment area is considered. Areas of the prevailing influence of the air temperature and different types of precipitation on Ob runoff fluctuations were identified. The long-term series of average annual water discharge in the Salekhard hydrometric station for the period 1936–2015 is reconstructed. The reconstructed series reproduces the measured interannual fluctuations and long-term trends of the average annual water discharge and found it to be good.

scholarly journals HYDROLOGICAL CHARACTERISTICS OF RIVER RUNOFF IN GEOECOLOGICAL STUDIES OF SURFACE WATER IN THE SLAVSKY DISTRICT, KALININGRAD REGION

2021 ◽  
Vol 31 (2) ◽  
pp. 185-197
Author(s):  
Yu.A. Spirin
Keyword(s):  
Water Use ◽  
River Flow ◽  
Water Discharge ◽  
Hydrological Characteristics ◽  
Coefficients Of Variation ◽  
Complete Set ◽  
Kaliningrad Region ◽  
Annual Water ◽  
Annual Water Discharge

An important issue in geoecological studies of watercourses can be considered the presence of integral and continuous hydrological series. On their basis, most of the hydrological calculations and structures are made, without which high-quality and rational water use is impossible. Unfortunately, in the Kaliningrad region, there are a number of difficulties with obtaining a complete set of recorded results of hydrological monitoring carried out over watercourses. The aim of the work was to collect hydrological information and calculate the main hydrological characteristics of the river flow of some watercourses in the Slavsky region. All the available data on hydrometric observations of the rivers of the considered territory were collected, on the basis of which hydrological series of average annual discharges were compiled. These rivers are: Zlaya, Osa, Matrosovka and Nemoninka. The missing data in the hydrological series of the average annual water discharge of the rivers under consideration were restored. The curves of the provision of average annual expenditures have been built according to the reconstructed data, and the average long-term expenditures, coefficients of variation and coefficients of asymmetry of the studied water bodies have been calculated. The entire methodology was based on the current set of rules for hydrological calculations. The results obtained can play an important role in further geoecological studies of watercourses in the Slavsk region, planning their use and in various project activities to develop water use.

scholarly journals SOURCES OF UNCERTAINTY AND PROBLEMS OF INCREASING THE ACCURACY OF FLOW ASSESMENT FOR THE TRANSBOUNDARY NARVA RIVER

2021 ◽  
Vol 1 ◽  
pp. 84-90
Author(s):  
Artem Iukhno ◽  
Tatiana Yakovleva ◽  
Yaroslav Kobears
Keyword(s):  
Russian Federation ◽  
Water Regime ◽  
River Flow ◽  
Water Discharge ◽  
Sources Of Uncertainty ◽  
Seasonal Factors ◽  
The Russian Federation ◽  
The Republic ◽  
Annual Water ◽  
Annual Water Discharge

The water regime of the transboundary Narva River has always been constantly addressed by the hydrometeorological community. For many years, at the interstate level (the Russian Federation and the Republic of Estonia), there has been a discussion about the accuracy of flow assessment and the correctness of the methods applicable for these purposes. In some years, the discrepancies between the estimates of the average annual water discharge obtained by the Estonian and Russian sides reach values of 20-27%. Sustainable, reliable water use requires updating approaches and achieving greater unambiguity in the flow assessment. In the presented article, various sources of uncertainty in the Narva river flow assessment as hydrodynamic, seasonal factors and imperfection of existing methods are considered. 

ŞİRVAN ÇAYLARININ AXIMININ ÇOXİLLİK TƏRƏDDÜDLƏRİ

2021 ◽  
Vol 1 (1) ◽  
pp. 38-45
Author(s):  
A.A Nuriyev
Keyword(s):  
Climate Changes ◽  
Water Discharge ◽  
Annual Precipitation ◽  
Seasonal Fluctuations ◽  
Observation Series ◽  
Annual Water ◽  
Annual Water Discharge ◽  
Linear Trends ◽  
Observation Period

Abstract. The article is devoted to the analysis of long-term fluctuations of the annual flow of the Shirvan rivers. The analysis used data from 4 rivers with an observation period of more than 50 years. linear trends were identified in the observation series, and their significance was assessed. The annual water discharge observations are divided into two series, covering 1961-1990 and 1991-2018. The dynamics of annual precipitation data of meteorological observation stations located in the study area were also analyzed. Annual precipitation increased in Goychay and Ismayilli meteorological stations, and partial decrease in Gabala and Oguz meteorological stations. The seasonal variation of the annual flow is also analyzed. According to data of Alijanchay and Girdimanchay, a decrease in annual flow was observed, and an increase was observed in Goychay and Turyanchay rivers. The seasonal fluctuations of the flow increased in the cold seasons and decreased in the warm seasons. Keywords: annual flow, long-term fluctuations, linear trends, climate changes

QARABAĞ ÇAYLARININ SU EHTİYATLARI

2021 ◽  
Vol 1 (1) ◽  
pp. 20-37
Author(s):  
R.A. İsmayılov
Keyword(s):  
Water Resources ◽  
River Flow ◽  
Water Discharge ◽  
Atmospheric Precipitation ◽  
Water Security ◽  
Observation Data ◽  
Management Measures ◽  
Average Observation ◽  
Annual Water ◽  
Annual Water Discharge

Abstract. Karabakh is one of the main regions in Azerbaijan where local water resources are formed. The article calculated the water resources of the area using the data of hydrological observation stations operating on the Karabakh rivers before the occupation. For research and analysis of average annual water discharge, multiyear observation data of hydrological stations operating on the Karabakh rivers were collected and integrated into the SpSS Statistics program. For the study multi-year average observation data of 32 hydrological stations in 20 rivers were collected. In order to determine the exact location of the hydrological stations operating in the area, a map was compiled using the Geographic Information System with reference to the fund and archive materials. In addition, hydrological zoning of the flow was carried out depending on the orographic features of Karabakh. During the analysis, two hydrological regions were identified. The first hydrological region is the Tartarchay-Guruchay hydrological region, and the second region is hakari-Oлchuchay hydrological region. As a result of the study, it was determined that the water resources of the Karabakh rivers are 1.64 km3 , which is 5.31% of the total water resources of Azerbaijan. During the implementation of water management measures in the area, in order to ensure the water security of the area, the resource potential of atmospheric precipitation and river flow for the area was analyzed and maps were compiled. Keywords: Karabakh rivers, hydrological station, water catchment area, water resources, water balance, hydrological zoning

scholarly journals Internal consistency of the IAGOS ozone and carbon monoxide measurements for the last 25 years

2020 ◽  
Author(s):  
Romain Blot ◽  
Philippe Nedelec ◽  
Damien Boulanger ◽  
Pawel Wolff ◽  
Bastien Sauvage ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Data Base ◽  
Internal Consistency ◽  
Selection Criteria ◽  
Meteorological Data ◽  
Atmospheric Composition ◽  
European Research ◽  
Air Masses ◽  
Long Term Trends

Abstract. The In-service Aircraft for a Global Observing System is a European research infrastructure that equips Airbus A340/330 with a system for monitoring atmospheric composition. The IAGOS instruments have three different configurations: IAGOS-CORE, IAGOS-MOZAIC and IAGOS-CARIBIC. Since 1994, there have been a total of 17 aircraft equipped. In this study, we perform an inter-comparison of about 8000 landing and take-off profiles to compare the O3 and CO measurements performed from these different configurations. The collocated profiles used in the study met various selection criteria. The first was a maximal 1 hour time difference between an ascent or descent by two different aircraft at the same airport and the second was a selection based on the similarity of air masses based on the meteorological data acquired by the aircraft. We provide here an evaluation of the internal consistency of the O3 and CO measurements since 1994. For both O3 and CO, we find no drift in the bias amongst the different instrument units (6 O3 and 6 CO IAGOS-MOZAIC instruments, 9 IAGOS-CORE Package 1 and the 2 instruments used in the IAGOS-CARIBIC aircraft). This results gives us confidence that the entire IAGOS data base can be treated as one continuous program, and is therefore appropriate for studies of long-term trends.

scholarly journals Characterization of Chyulu Hills Watershed Ecosystem Services in South-Eastern Kenya

2016 ◽  
Vol 6 (3) ◽  
pp. 65
Author(s):  
John Warui Kiringe ◽  
Francis Mwaura ◽  
Fiesta Warinwa
Keyword(s):  
Ground Water ◽  
Water Discharge ◽  
Water Source ◽  
Water Volume ◽  
Dry Land ◽  
Shallow Wells ◽  
Water Provision ◽  
Annual Water ◽  
Annual Water Discharge

<p class="1Body">Water is an important good provided by watersheds and is critical in sustaining life and socio-economic development. This study evaluated water provision in the Chyulu Hills watershed which is one of the important dry land water catchments in Kenya. Surface water discharge was mainly through rivers and springs with the latter being more prevalent than the former while ground water provision was primarily through boreholes and shallow wells. Springs discharged the highest water volume annually estimated at 128.14million m<sup>3</sup> or 85.14% of all the water discharged in the watershed, with shallow wells and boreholes discharging the least water. For all the springs found in the watershed, Mzima springs discharged the highest water volume estimated at nearly 113.15 million m<sup>3</sup> annually or 88.30% of the water produced by all the springs; and about 75.19% of the water in the entire watershed. Rivers which were active had a total water discharge of about 20.66million m<sup>3</sup> per year, with Kibwezi River discharging 17.59 million m<sup>3</sup> annually or 85.14% of all the water from rivers. Shallow wells were mainly prevalent at Nthongoni and the Makindu, and their annual water discharge was about 16.96million m<sup>3</sup> per year with boreholes contributing 98.87% (approximately 16.76 million m<sup>3</sup>/yr.) of the ground water, and the rest (19,169.92m<sup>3</sup>/yr.) being contributed by shallow wells. The total amount of water discharged in the watershed by the combined water source types was about 150.49 million m3/yr.</p>

ИЗМЕНЧИВОСТЬ ГОДОВОГО СТОКА РЕКИ АЛАЗАНИ (ГАНЫХ)

2021 ◽  
Vol 1 (1) ◽  
pp. 7-19
Author(s):  
Ф.А Иманов ◽  
Г.И. Кордзахия ◽  
И.С Алиева
Keyword(s):  
Water Discharge ◽  
Correlation Coefficients ◽  
Annual Runoff ◽  
Positive Trend ◽  
Runoff Water ◽  
Transboundary River ◽  
Runoff Change ◽  
Annual Water ◽  
Annual Water Discharge ◽  
The Impact

Abstract. The analysis of spatial and temporal regularities of the annual runoff of the transboundary river Alazani (Ganikh), which flows through the territory of Georgia and Azerbaijan, has been carried out. The series on the average annual water discharge of 6 hydrological gauges for the period from 1925 to 2017/2019 was used. It was found that for the researched rivers, the fluctuations of the average annual water discharges are in phase, however, the absence of strict synchronicity in the fluctuations of the annual runoff leads to a decrease in the spatial correlation coefficients. In the studied series of river Alazani (Ganikh) both on the territory of Georgia and Azerbaijan, there is no trend; however, for a number of annual runoff of the Ayrichai River, the main tributary of the r. Alazani (Ganikh), a significant positive trend was revealed. It should be noted that the reason for the nonstationarity is the climate change, the impact of which on runoff has become noticeable in recent decades. It was found that the variance of the second half of the analyzed series increased. The annual runoff of the Alazani (Ganikh) River has changed very little over 1991-2017 / 2019 compared with the period 1961-1990. For the Ayrichai River, the second period is characterized by increased water content. Keywords: River Alazani (Ganikh), Annual runoff, Water discharge, Transboundary river, Runoff change.

scholarly journals Internal consistency of the IAGOS ozone and carbon monoxide measurements for the last 25 years

2021 ◽  
Vol 14 (5) ◽  
pp. 3935-3951
Author(s):  
Romain Blot ◽  
Philippe Nedelec ◽  
Damien Boulanger ◽  
Pawel Wolff ◽  
Bastien Sauvage ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Internal Consistency ◽  
Selection Criteria ◽  
Meteorological Data ◽  
Atmospheric Composition ◽  
European Research ◽  
Air Masses ◽  
Civil Aircraft ◽  
Long Term Trends

Abstract. The In-service Aircraft for a Global Observing System (IAGOS) is a European research infrastructure that equips the Airbus A340/330 with a system for monitoring atmospheric composition. The IAGOS instruments have three different configurations: IAGOS-Core, IAGOS – Measurement of Ozone and Water Vapor by Airbus In Service Aircraft (IAGOS-MOZAIC) and IAGOS – Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container (IAGOS-CARIBIC). Since 1994, there have been a total of 17 aircraft equipped. In this study, we perform an intercomparison of about 8000 landing and takeoff profiles to compare the O3 and CO measurements performed from these different configurations. The collocated profiles used in the study met various selection criteria. The first was a maximal 1 h time difference between an ascent or descent by two different aircraft at the same airport and the second was a selection based on the similarity of air masses based on the meteorological data acquired by the aircraft. We provide here an evaluation of the internal consistency of the O3 and CO measurements since 1994. For both O3 and CO, we find no drift in the bias amongst the different instrument units (six O3 and six CO IAGOS-MOZAIC instruments, nine IAGOS-Core Package1 and the two instruments used in the IAGOS-CARIBIC aircraft). This result gives us confidence that the entire IAGOS database can be treated as one continuous program and is therefore appropriate for studies of long-term trends.

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