2024-03-28T14:40:21Zhttp://nur.nu.edu.kz/oai/requestoai:nur.nu.edu.kz:123456789/8302021-02-05T10:25:51Zcom_123456789_79com_123456789_67col_123456789_822
Boundary layer receptivity and resonance caused by tuned disturbances within cascade flows
Rojas-Solorzano, L.
The receptivity and stability of steady non-separated and unsteady separated boundary layers in a two-dimensional airfoil cascade flow is investigated by Direct Numerical Simulation of the time-dependent Navier-stokes and continuity equations. The study includes the effects caused by the introduction of free-steam time-harmonic disturbances. The calculation of the transport, generation and dissipation of Fluctuating Kinetic Energy is introduced as a non-classical technique in the analysis
Nazarbayev University School of Engineering and Digital Sciences
1997-05-10
Thesis of the employee
en
http://nur.nu.edu.kz/handle/123456789/830
http://nur.nu.edu.kz/bitstream/123456789/830/3/PhD_Dissertation_L_Rojas-Solorzano_CMU_1997.pdf.txt
21b90b1d74308354ecf5d9b95c33b244
http://nur.nu.edu.kz/bitstream/123456789/830/1/PhD_Dissertation_L_Rojas-Solorzano_CMU_1997.pdf
1387180c50b7e7f4d0f3a1abc5ada952
http://nur.nu.edu.kz/bitstream/123456789/830/2/license.txt
8a4605be74aa9ea9d79846c1fba20a33
Research Subject Categories::TECHNOLOGY::Engineering mechanics
mechanical engineering
fluid mechanics
oai:nur.nu.edu.kz:123456789/12422021-02-05T10:25:53Zcom_123456789_79com_123456789_67col_123456789_822
Integrated Approach for the Assessment and Development of Groundwater Resources in Arid Lands: Applications in the Quetta Valley, Pakistan
Sagin, Jay
The lack of adequate field measurements (e.g., precipitation and stream flow) and
difficulty in obtaining them often hampers the construction and calibration of rainfallrunoff
models over many of the world’s watersheds, leaving key elements of the
hydrologic cycle unconstrained. We adopted methodologies that rely heavily on readily
available remote sensing datasets as viable alternatives and useful tools for assessing,
managing, and modeling the water resources of such remote and inadequately gauged
regions. The Soil and Water Assessment Tool was selected for continuous (1998–2005)
rainfall-runoff modeling of the northeast part of the Pishin Lora basin (NEPL), a
politically unstable area that lacks adequate rain gauge and stream flow data. To account
for the paucity of rain gauge and stream flow gauge data, input to the model included
satellite-based Tropical Rainfall Measuring Mission TRMM precipitation data. Modeled
runoff was calibrated against satellite-based observations including: (1) monthly
estimates of the water volumes impounded by the Khushdil Khan (latitude 30° 40'N,
longitude 67° 40'E) and the Kara Lora (latitude 30° 34'N, longitude 66° 52'E) reservoirs,
and (2) inferred wet versus dry conditions in streams across the NEPL throughout this
period. Calibrations were also conducted against observed flow reported from the Burj
Aziz Khan station at the NEPL outlet (latitude 30°20'N; longitude 66°35'E). Model
simulations indicate that (1) average annual precipitation (1998–2005), surface runoff,
and net recharge are 1,300 × 106 m3, 148 × 106 m3, and 361 × 106 m3, respectively; (2)
within the NEPL watershed, precipitation and runoff are high for the northeast
(precipitation: 194 mm/year; runoff: 38 × 106 m3/year) and northwest (134 mm/year; 26 ×
106 m3/y) basins compared to the southern basin (124 mm/year; 8 × 106 m3/year); and (3)
construction of delay action dams in the northeast and northwest basins of the NEPL
could increase recharge from 361 × 106 m3/year up to 432 × 106 m3/year and achieve
sustainable extraction. The adopted methodologies are not a substitute for traditional
approaches that require extensive field datasets, but they could provide first-order
estimates for rainfall, runoff, and recharge in the arid and semi-arid parts of the world
that are inaccessible and/or lack adequate coverage with stream flow and precipitation
data.
Nazarbayev University School of Engineering and Digital Sciences
2010-12
Thesis of the employee
en
http://nur.nu.edu.kz/handle/123456789/1242
http://nur.nu.edu.kz/bitstream/123456789/1242/4/DissertJayv15.pdf.txt
26b2eb7640460967d0fb6126ad80b04c
http://nur.nu.edu.kz/bitstream/123456789/1242/1/DissertJayv15.pdf
45f71640c8d610263919a58374ae02c6
http://nur.nu.edu.kz/bitstream/123456789/1242/3/license.txt
44fb9e33156baac43c2dae0daa7f4a65
Attribution-NonCommercial-ShareAlike 3.0 United States
Groundwater Resources
oai:nur.nu.edu.kz:123456789/12492021-02-05T10:25:55Zcom_123456789_79com_123456789_67col_123456789_822
Relationship between 20th Century Dune Migration and Wetland Formation at Cape Cod National Seashore, Massachusetts
Sagin, Jay
Outer Cape Cod (Massachusetts) is dominated by active and stabilizing parabolic
and transverse dunes interspersed with numerous inter-dune wetlands. Dune migration has been significantly affected by human activities; conversely, current dune movements are affecting local populations. The objective of the reported research was to assess, using remote sensing and geographic information systems (GIS) technologies, migration of the Cape Cod dunes and the effect of dune movement on distribution of associated wetlands. Aerial photographs from 1938 through 2003 were analyzed to track individual dune movements and subsequent wetland propagation and expansion. Absolute dune movement rates during this period were computed, with a plot of dune movement as a cumulative function. One sub-problem of this study was to quantify ‘white’ areas of active moving sand and ‘dark’ areas of vegetation, in order to quantify changes in vegetative cover with wetland propagation and, conversely, vegetative disappearance with dune movement. Attempts were made to correlate the Palmer Drought Severity Index (PDSI) with dune migration. Based on review of aerial photographs, parabolic dunes have migrated 150 to 250 m since 1938, with 60% of the movement occurring between 1938 and 1977. The relation between absolute parabolic dune migration and corresponding PDSI is approximately logarithmic. Maximum dune migration is associated with PDSI values lower than –2 and reflects moderate drought conditions. Wetlands consistently trailed the dunes, and the distance of wetland movement was related to dune movement distances. Wetland migration was particularly marked from the 1950s to the 1980s. Based on review of georeferenced aerial photographs, it is concluded that marked stabilization of Cape Cod dunes occurred in the 1980s and 1990s, with renewed movement in the 21st Century. This
study provides a practical application for assessment of dune migration and vegetative
transformations over time using remote sensing and GIS technologies
Nazarbayev University School of Engineering and Digital Sciences
2006-05
Thesis of the employee
en
http://nur.nu.edu.kz/handle/123456789/1249
http://nur.nu.edu.kz/bitstream/123456789/1249/4/Sagin_CapeCodMA.pdf.txt
3eeaa1b40b5b4295aea1f6274dfe796d
http://nur.nu.edu.kz/bitstream/123456789/1249/1/Sagin_CapeCodMA.pdf
913d05bccfa2711576a167f72c49e003
http://nur.nu.edu.kz/bitstream/123456789/1249/3/license.txt
44fb9e33156baac43c2dae0daa7f4a65
Attribution-NonCommercial-ShareAlike 3.0 United States
Dune migration
oai:nur.nu.edu.kz:123456789/54902022-02-08T11:25:40Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61352022-06-13T03:27:16Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61772022-06-13T03:26:31Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61842022-06-13T03:27:20Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61862022-06-13T03:26:28Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61882022-06-13T03:27:21Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61892022-06-13T03:27:18Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61902022-06-13T03:27:14Zcom_123456789_79com_123456789_67col_123456789_822oai:nur.nu.edu.kz:123456789/61952022-06-13T03:26:34Zcom_123456789_79com_123456789_67col_123456789_822