AI SearchAssessment of alterations in hydrologic regime using a machine learning technique and water quality changes due to hydropower dam development in the Lancang-Mekong River Basin (Record no. 8974)
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| 005 - DATE AND TIME OF LATEST TRANSACTION | |
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| 035 ## - SYSTEM CONTROL NUMBER | |
| System control number | .b12393617 |
| 099 #9 - LOCAL FREE-TEXT CALL NUMBER (OCLC) | |
| Classification number | AIT Thesis no.WM-22-11 |
| 100 1# - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Ishankha, Wickramaarachchi Colambage Achini |
| 245 10 - TITLE STATEMENT | |
| Title | Assessment of alterations in hydrologic regime using a machine learning technique and water quality changes due to hydropower dam development in the Lancang-Mekong River Basin |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. | |
| Place of publication, distribution, etc. | Pathum Thani, Thailand : |
| Name of publisher, distributor, etc. | Asian Institute of Technology, |
| Date of publication, distribution, etc. | 2022 |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 124 leaves : |
| Other physical details | ill. |
| 490 1# - SERIES STATEMENT | |
| Series statement | Thesis; |
| Volume/sequential designation | no. WM-22-11 |
| 500 ## - GENERAL NOTE | |
| General note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Water Engineering and Management |
| 502 ## - DISSERTATION NOTE | |
| Dissertation note | Thesis (M. Sc.) - Asian Institute of Technology, 2022 |
| 520 ## - SUMMARY, ETC. | |
| Summary, etc. | Large-scale hydropower dam development in the mainstream of Lancang-Mekong basin led in significant flow regime alterations in past few decades. In this research, the Indicators of Hydrologic Alteration (IHA) was utilized to determine statistical characteristics of observed and predicted streamflow. The natural streamflow was predicted using Random Forest (RF) model at four hydrological stations along the mainstream in the pre-impact period (1961-1991), the transition period (1992-2008), and post-impact period (2009-2021). The streamflow alteration was more significant particularly in the post-impact period in comparison to both pre-impact period and forecasted non-regulated flow at the stations. The trend of annual high flow threshold magnitudes decreased significantly whereas that of annual low flow thresholds increased over 1961-2021 at the gauging stations at the 0.05 significance level. Furthermore, the highest overall hydrological alteration of observed flow compared to pre-impact period was at upstream Chiang Saen station (77.3%) and it decreased towards the downstream. The median monthly flow, the annual extreme water conditions, the rate, and frequency of flow change groups of IHA were found to be highly altered in the post-impact period compared to natural flow condition in the same period. It is investigated that the human activities contributed more to the total streamflow changes than climate variability in post-impact period compared to pre impact period particularly in Chiang Saen (68.3%) and Stung Treng (76.4%). The contribution of human activities on streamflow change in Chiang Saen based on 5-year analysis indicated clear relationship with hydropower dam commissions in the Upper Mekong Basin (UMB). Overall, the Water Quality Index for Protection of Aquatic Life (WQIal) was varied 2Good3 to 2High3 (1986-2017) at the stations. However, long-term water quality data is required to clearly assess alterations in water quality due to recent hydropower dam developments in the basin. Identifying historical hydrological and water quality changes due to hydropower dam development will facilitate basis for future hydropower dam development and reservoir operation in the basin as well as to enhance the transboundary cooperation. |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Hydrology |
| Geographic subdivision | Mekong River Basin |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Hydroelectric power plants |
| Geographic subdivision | Mekong River Basin |
| 650 #0 - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | Water quality |
| Geographic subdivision | Mekong River Basin |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Shrestha, Sangam, |
| Relator term | Chairperson |
| 700 1# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Babel, Mukand Singh, |
| Relator term | Examination Committee |
| 700 0# - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ho Huu Loc, |
| Relator term | Examination committee |
| 710 2# - ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | His Majesty the King's Scholarship (Thailand), |
| Relator term | Scholarship Donor |
| 810 2# - SERIES ADDED ENTRY--CORPORATE NAME | |
| Corporate name or jurisdiction name as entry element | Asian Institute of Technology. |
| Title of a work | Thesis; |
| Volume/sequential designation | no. WM-22-11 |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Materials specified | Full-Text |
| Uniform Resource Identifier | <a href="http://203.159.5.9/ait-thesis/detail.php?q=B17451">http://203.159.5.9/ait-thesis/detail.php?q=B17451</a> |
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| CREATED | CREATED : 2022-10-10 |
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| Withdrawn status | Lost status | Damaged status | Not for loan | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Barcode | Date last seen | Copy number | Price effective from | Koha item type | Cost, normal purchase price |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 17/08/2026 | AIT Thesis no.WM-22-11 | 30020220005576 | 17/08/2026 | 1 | 17/08/2026 | 40-Archives | |||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | Archives | 17/08/2026 | AIT Thesis no.WM-22-11 | 17/08/2026 | 17/08/2026 | 61-CD-ROM | |||||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 17/08/2026 | AIT Thesis no.WM-22-11 | 30050121067242 | 17/08/2026 | 1 | 17/08/2026 | 20-AIT Publication | 50.00 | ||||
| Available for Loans | Asian Institute of Technology Library | Asian Institute of Technology Library | AIT Publications | 17/08/2026 | AIT Thesis no.WM-22-11 | 30050121067259 | 17/08/2026 | 2 | 17/08/2026 | 20-AIT Publication | 50.00 |