Hydrological Regime of the Nile Delta and Dynamics of Its Coastline     

Mikhailova  M. V. 《Water Resources》2001,28(5):477-490

General information on the Nile River basin is presented. Specific features of the morphological regime of the Nile Delta and its near-shore zone, as well as the delta water balance and groundwater regime are discussed. The dynamics of the sea coastline of the Nile Delta is described in great detail. It is shown that the recent delta of the Nile and its sea coastline have been formed under the joint impact of the eustatic sea level rise, subsidence of sediments in the northern part of the deltaic plain, and considerable decrease in the river sediment runoff after the construction of the Aswan High Dam.  相似文献   

Assessing the morphodynamical complexity of a large river in planning hydroeconomic measures (as exemplified by the Ob’)     

R. S. Chalov  S. N. Ruleva  N. M. Mikhailova 《Geography and Natural Resources》2016,37(1):9-17

Along the entire length of a large river there is taking place a substantial change in the formation conditions and stability of the channel, the rate and character of channel deformations and, accordingly, in the possibilities of water resources utilization, transport and engineering development of the river. By parametrizing the channel processes, it is possible to rank the river sections according to the degree of complexity of the channel processes, forms of their manifestation, and to the regime of channel reconfiguration, which, in turn, determines the possibilities of planning the measures ensuring the water resources utilization. Using the Ob’ as an example, we provide a rationale for the criteria for singling out the river sections differing by the degree of complexity of the channel processes, on the basis of parameters characterizing the forms of their manifestation, the state of the channels, and the intensity of deformations. We have identified eight sections of a different length, sequentially alternating along the length of the river from the confluence of the Biya and Katun’ as far as the mouth. The ranking of the river sections permitted the future planning of the water resources utilization measures.  相似文献   

Batievaite-(Y), Y2Ca2Ti[Si2O7]2(OH)2(H2O)4, a new mineral from nepheline syenite pegmatite in the Sakharjok massif,Kola Peninsula,Russia     

L. M. Lyalina  A. A. Zolotarev  E. A. Selivanova  Ye. E. Savchenko  S. V. Krivovichev  Yu. A. Mikhailova  G. I. Kadyrova  D. R. Zozulya 《Mineralogy and Petrology》2016,110(6):895-904

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Leaching rare-earth and radioactive elements from alkaline rocks of the Lovozero Massif,Kola Peninsula     

V. N. Ermolaeva  A. V. Mikhailova  L. N. Kogarko  G. M. Kolesov 《Geochemistry International》2016,54(7):633-639

The paper presents data on the leaching efficiency of rare-earth (La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, and Lu) and radioactive (Th and U) elements by various reagents from alkaline rocks of the Lovozero Massif. Element concentrations were analyzed by ICP-MS and instrumental neutral activation (INAA). A new complex technique is suggested for analyzing elements on the solid phase of polymer hydrogels. This technique makes it possible to enhance the sensitivity and selectivity of INAA when these elements are simultaneously contained in rocks. Data are presented on the selective leaching of trace elements and the application of environmentally safe reagents.  相似文献   

Upwelling in the north-western Black Sea during the period of summer-time warming     

E. N. Mikhailova  V. A. Ivanov  V. R. Kosnyrev 《Physical Oceanography》1997,8(4):243-251

A numerical multilevel model based on primitive equations of sea thermohydrodynamics is applied to investigate the development of near-shore upwelling zones in the north-western Black Sea. Analysed are the results of eight numerical experiments on mapping the areas of upwelling and downwelling, depending on wind direction. The acquired data are matched up with the observations by the NOAA-11 satellite designed to measure sea surface radiation temperature twice a day. The numerical calculations are shown to agree with the remotely-sensed data. Translated by Vladimir A. Puchkin.  相似文献   

Generation of Upwelling near the Pacific Coast of Mexico     

S. N. Bulgakov  N. P. Bulgakov  E. N. Mikhailova  N. B. Shapiro 《Physical Oceanography》2005,15(1):27-36

In a series of numerical experiments, we simulate the process of generation of coastal upwelling induced by the winds of various directions in the central part of the Pacific Coast of Mexico (18–24°N, 103– 107°W). The numerical nonlinear multilevel model [see E. N. Mikhailova, I. M. Semenyuk, and N. B. Shapiro, “ Modeling of the variability of hydrophysical fields in the Tropical Atlantic,” Izv. Akad. Nauk SSSR, Fiz. Atmosf. Okean., 27, No. 10, 1139–1148 (1991)] is adapted to the region of investigations with 9-km space resolution by specifying the conditions of flow through the open lateral boundaries. The results of numerical experiments demonstrate that the NW, N, NE, and E winds are especially favorable for the generation of intense upwelling.__________Translated from Morskoi Gidrofizicheskii Zhurnal, No. 1, pp. 32–41, January–February, 2005.  相似文献   

A New Approach to Studying Delta Formation     

Mikhailova  M. V. 《Water Resources》2022,49(5):895-900

Water Resources - The article examines delta formation processes and suggests a new approach to their study. In the paper, delta formation is divided into its active and passive component. The...  相似文献   

Batagayite,CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O,a new phosphate mineral from Këster tin deposit (Yakutia,Russia): occurrence and crystal structure     

Yakovenchuk  Victor N.  Pakhomovsky  Yakov A.  Konopleva  Nataliya G.  Panikorovskii  Taras L.  Bazai  Ayya  Mikhailova  Julia A.  Bocharov  Vladimir N.  Ivanyuk  Gregory Yu.  Krivovichev  Sergey V. 《Mineralogy and Petrology》2018,112(4):591-601

Mineralogy and Petrology - Batagayite, CaZn2(Zn,Cu)6(PO4)4(PO3OH)3·12H2O, is a new secondary phosphate mineral from the Këster deposit, Arga-Ynnykh-Khai massif, NE Yakutia, Russia. It is...  相似文献   

Spatio-temporal analysis of flowering using LiDAR topography     

Samantha Hart  Elena Mikhailova  Christopher Post  Patrick McMillan  Julia Sharp  William Bridges 《地理学报(英文版)》2017,27(1):62-78

Spatio-temporal patterns of flowering in forest ecosystems are hard to quantify and monitor. The objectives of this study were to investigate spatio-temporal patterns(e.g. soilssimple slope classesslope aspectand flow accumulation) of flowering around Lake IssaqueenaSouth Carolina(SCUSA) using plant-flowering database collected with GPS- enabled camera(stored in Picasa 3 web albums and project website) on a monthly basis in 2012 and Li DAR-based topography. Pacolet fine sandy loam had the most flowering plantsfollowed by Madison sandy loamboth dominant soil types around the lake. Most flowering plants were on moderately steep(17%–30%) and gently sloping(4%–8%) slopes. Most flowering plants were on west(247.5°–292.5°)southwest(202.5°–247.5°)and northwest(292.5°–337.5°) aspects. Most flowering plants were associated with minimum and maximum flows within the landscape. Chi-square tests indicated differences in the distributions of the proportions of flowering plants were significant by soil typeslopeaspectand flow accumulation for each month(February-November)for all months(overall)and across months. The Chi-square test on area-normalized data indicated significant differences for all months and individual differences by each month with some months not statistically significant. Cluster analysis on flowering counts for nine plant families with the most flowering counts indicated no unique separation by clusterbut implied that the majority of these families were flowering on strongly sloping(9%–16%) slopeson southwest(202.5°–247.5°) aspectsand low flow accumulation(0–200). Presented methodology can serve as a template for future efforts to quantify spatio-temporal patterns of flowering and other phenological events.  相似文献   

Nikmelnikovite,Ca 12 Fe 2+ Fe $$_{3}^{{3 + }}$$ Al 3 (SiO 4 ) 6 (OH) 20 : A New Mineral from the Kovdor Massif (Kola Peninsula,Russia)     

Krivovichev  S. V.  Yakovenchuk  V. N.  Panikorovskii  T. L.  Savchenko  E. E.  Pakhomovsky  Ya. A.  Mikhailova  Yu. A.  Selivanova  E. A.  Kadyrova  G. I.  Ivanyuk  G. Yu. 《Doklady Earth Sciences》2019,488(2):1200-1202

Doklady Earth Sciences - Nikmelnikovite, Ca12Fe2+Fe$$_{3}^{{3 + }}$$Al3(SiO4)6(OH)20, a new mineral from the Kovdor massif (Kola Peninsula, Russia), is described. It is the first trigonal...  相似文献