Nghiên cứu diễn biến bờ biển bằng mô hình toán số áp dụng vào khu vực bờ biển phan thiết, tỉnh bình thuận

i I H C QU C GIA TP HCM I H C BÁCH KHOA C AN NGHIÊN C U DI N BI N B BI N B NG MƠ HÌNH TOÁN S ÁP D NG VÀO KHU V C B BI N PHAN THI T, T NH BÌNH THU N NUMERICAL STUDY ON SHORELINE CHANGE APPLICATION TO A PHAN THIET SHORELINE SECTION (BINH THUAN PROVINCE) Chuyên ngành: K Thu t Xây D ng Cơng Trình Th y Mã s : 60580202 LU THÀNH PH H CHÍ MINH, tháng ii c hoàn thành t i: i h c Bách Cán b ng d n khoa h c 1: PGS TS Hu Cán b ng d n khoa h c 2: TS Tr n H i Y n Cán b ch m nh ng Cán b ch m nh ng Lu cb ov t i h c Bách Khoa gia Thành ph H m: c - Ch t ch H c - ng - Ph n bi n ng PGS TS Hu ng - Ph n bi n - y viên Xác nh n c a Ch t ch H lý chuyên ngành sau lu CH T CH H i h c Qu c (tr c n) Thành ph n H TS H Tu HQG-HCM ng Khoa qu n c s a ch a NG NG KHOA K THU T XÂY D NG iii I H C QU C GIA TP.HCM I H C BÁCH KHOA C NG HÒA XÃ H I CH c l p T T NAM H nh phúc NHI M V LU H tên h c viên: C AN MSHV: 1970297 09/05/1984 Thanh Hóa Chuyên ngành: K thu t Xây d ng cơng trình th y Mã s : 60580202 TÀI Nghiên c u di n bi ng b bi n b ng mơ hình tốn s Áp d ng vào khu v c b bi n Phan Thi t, t nh Bình (Numerical study on shoreline change Application to a Phan Thiet shoreline section, Binh Thuan province) II NHI M V VÀ N I DUNG II.1 Nghiên c u m áp d ng vào m ng di n bi ng b bi n n b bi n Phan Thi t thu c t nh Bình Thu n II.2 II.2.1 - Nghiên c u lý thuy t v sóng dịng ven b - Nghiên c u mơ hình tốn s c a c a Yen Hai Tran, Eric Barthelemy (2020) phát tri n II.2.2 II.2.3 II.2.4 III NGÀY GIAO NHI M V IV NGÀY HOÀN THÀNH NHI M V iv V CÁN B NG D N ng d n 1: PGS TS Hu ng d n 2: TS Tr n H i Y n Thành ph H Chí Minh, ngày 20 tháng CÁN B NG D N 21 NG D N CH NHI M NG D N B NG KHOA K THU T XÂY D NG O v L IC M Trong su t qu tr nh h c t p v ho n th nh lu nh cs ng d n, gi qu b u c a c c th y cô, c c anh ch , c c em v c c b n V i l ng k nh tr ng v bi cb yt l ic nh t i: n l i gi Ban Gi m hi u, Ph ng ot i h c, B môn K thu t Tài nguyên ng i h c Bách Khoa Thành ph H t om u ki n thu n qu tr nh h c t p v ho n th nh lu PGS- TS Hu n H i Y n h t l ng gi , d yb ng viên v t o m u ki n thu n l i cho su t qu tr nh h c t p v ho n th nh lu t nghi p qu b C c th y cô h ho n ch nh lu ng ch m lu y cho nh ng g p Các th y cô B môn K thu t Tài nguyên n c, anh ch em h c viên l p cao h c Xây d ng công trình th y 2019 ng nghi p c a tơi ngành xây d p s li u c n thi t cho lu M t l n n a, xin g i l i c n th y PGS- TS Hu n H i Y n nh ng c ti ng d n su t q trình làm lu y B mơn K thu t Tài nguyên n c, anh ch em h c viên l p cao h c Xây d ng cơng trình th y 2019 tơi hồn thành lu Thành ph H Chí Minh, ngày 20 tháng H C VIÊN TH C HI N c An vi TÓM T T LU Di n bi ng b q trình xói l - b i t d c b bi n nhi u y u t ng u t ch y u sóng, tri u), làm t - xã h i c i s ng, kinh i công n b bi n xã Ti n Thành, Thành ph c, có chi u dài kho ng 16km, thu Phan Thi m gi a c a cung b n, dây cung ch ng xu t hi n s c c ng sóng theo mùa gió Tây, Tây Nam ho c B bi n xã ng xu t hi n dòng ven b theo hai mùa có c nhau, th hi n rõ nh t có nh Tây Nam l - ng Tây Nam- ng gi a sóng khúc x t Ti n Thành, Thành ph Phan Thi ng B c - n b cb iv b xói vào mùa gió ng th i, khu v c vùng v a có k t c u b a có k t c u cát b r i, cát k h ng ch ng b i ng b nh, tr m n ng n ng b thu c xã Ti n Thành xu t hi n xói l v Nên bãi bi n nh ng xuyên x y trình xói l - b i t ngày có d u hi ng l i s ng c i dân doanh nghi p Vì v y, m c tiêu c a lu khoa h d ng mơ hình toán s nghiên c u làm xu t gi i pháp phịng ch ng xói - l b bi n xã Ti n Thành, Thành ph Phan Thi t, t nh Bình Thu n M c tiêu c th là: s d ng m t mơ hình tích h p c a Yen Hai Tran, Eric Barthelemy (2020) phát tri n nghiên c u di n bi ng b bi n áp d ng n b bi n Phan Thi t thu c t nh Bình Thu n vii ABSTRACT The shoreline evolution is the process of erosion - accretion along the coast due to many factors (mainly factors are waves and tides) This process is affecting human life, economy and society A number of coastal erosion prevention measures have been invested and implemented in many places; however the lack of scicentific viewpoints or the inconsistent construction made those measures not achieve the expected effectiveness while being destroyed Currently, scientists have used numerical modeling methods to simulate and forecast shoreline changes to build the scientific foundation for providing solutions to prevent erosion accretion The shoreline of Tien Thanh commune, Phan Thiet city has a North - Northeast direction, with a length of about 16km, belonging to the midpoint of the Mui Ne - Mui Ke Ga coast with two rocky promontories; the area has direction of the WestsouthNortheast and it often gets the resonance between refracted waves (from the rocky promontories) and the main waves (from the seasonal wind blows of direction West, Southwest or East, Northeast) The coast of Tien Thanh commune, Phan Thiet city often has coastal currents in two seasons with opposite directions, it is shown clearly that eroded coastlines in the southwest season are accreted in the east and east seasons At the same time, this geological structure of this area is both weathered rocky-shore and sporadic sand (red sand) The shore receive strongly east wind; however, the coastline is relatively stable, except for a short one at Tien Thanh commune (this area appears to be eroded in the East wind season) Therefore, in recent years, this beach has often occurred the process of erosion accretion and increases more This greatly affects to the lives of local people and businesses Therefore, the objective of the thesis is to apply numerical mathematical model to build the scientific foundation for proposing solutions, measures in oder to prevent coastal erosion in Tien Thanh commune, Phan Thiet city, Binh Thuan province Specific objectives are: to use an integrated model developed by of Yen Hai Tran & Eric Barthelemy (2020) to study coastal changes and apply this model to a section of Phan Thiet coastline in Binh Thuan province viii L Lu A TÁC GI cv Nghiên c u di n bi ng b bi n b ng mơ hình tốn s Áp d ng vào khu v c b bi n Phan Thi t, t nh Bình (Numerical study on shoreline change Application to a Phan Thiet shoreline section, Binh Thuan province) hoàn toàn tơi nghiên c u th c hi n v i s d n PGS TS Hu ng n H i Y n, không chép hay copy n i dung lu li u có ngu n g c rõ ràng, tài li u trích d n u có ghi ngu n g c, k t qu c trình bày lu hồn tồn ch u trách nhi m v s n ph m nghiên c u c a Thành ph H Chí Minh, ngày 20 tháng H C VIÊN TH C HI N Lê c An c Tôi xin ix M CL C M U 1 tv M u N i dung nghiên c u a) Nghiên c lý thuy t c a mơ hình tốn b) Thu th p x lý s li c) Áp d d) c K t qu d ki n bi ng b bi n nghiên n 2014 2018 n b bi n c n nghiên c u n b bi n nghiên c u u Ph m vi nghiên c u B c c lu T NG QUAN 1.1 M t s khái ni m v di n bi 1.2 Các nghiên c ng b c v bi ng b 1.2.1 Nghiên c c 1.2.2 Nghiên c c 1.3 T ng quan v khu v c nghiên c u 11 1.3.1 Hi n tr ng khu v c nghiên c u 12 , 13 11 1.3.2 1.4 d li K t lu a ch t, th 12 , 13 16 18 19 MƠ HÌNH TỐN S 19 2.1 lý thuy t v sóng dịng ven b 14 , 15 19 2.1.1 Quá trình hình thành sóng 19 2.1.2 S lan truy n sóng 19 2.1.3 S c nơng sóng v 21 x 2.1.4 Vùng sóng v (Surf zone waves) 23 2.1.5 Hình thái bãi bi n trình chuy n t i bùn cát 24 2.1.6 Quá trình chuy n t i bùn cát 25 2.1.7 Xói mịn, b ng h 2.1.8 Chuy n t i d c b 2.2 n cát 25 ng c n di n bi ng b 26 Mơ hình tốn s [13] 29 2.2.1 H 29 2.2.2 Các lo u ki 2.2.3 u ki n biên 31 i 31 32 NG D NG MÔ HÌNH TỐN S VÀO VÙNG B BI N XÃ TI N THÀNH THÀNH PH PHAN THI T - T NH BÌNH THU N 32 3.1 Truy xu t s li u mơ hình 32 3.1.1 Truy xu t s li ng b 32 3.1.2 Truy xu t s li u sóng 35 3.2 Các thông s ch y mơ hình 36 3.2.1 Thông s d li ng b S(t) 36 3.2.2 Thơng s d li u sóng 43 3.3 Thi t l p mơ hình tốn s cho vùng b bi n xã Ti n Thành thành ph Phan Thi t t nh Bình thu n 53 3.4 ng h p tính toán 53 3.5 Trình t gi i mơ hình tốn s 54 3.6 K t qu tính tốn nh n xét 55 K T LU N VÀ KI N NGH 78 K t qu c 78 M t s m t h n ch c n nghiên c u ti p 78 ng phát tri n 78 TÀI LI U THAM KH O 80 PH L C 82 90 Dir_dd48 2013 2013 2013 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1425 1728 19301021 1526 1728 20311122 1425 1627 18291021 1223 1526 1 2 3 4 5 6 7 8 9 1010101111111212121 2 3 4 5 6 7 8 9 1010101111111212121 1 2 3 4 5 6 7 8 9 1010111111121212 Tp_ff50 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2016 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2017 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 2018 10 1 1223 1425 1829 20 1223 1425 1728 19301021 1324 1526 1829 20311122 1627 18291021 1223 1526 1728 19301122 1324 1627 1829 20 1425 1627 19301021 1324 1526 1728 20311122 1425 1 2 3 4 5 6 7 8 9 1010101111111212121 1 2 3 4 5 6 7 8 9 10101111111212121 1 2 3 4 5 6 7 8 9 1010101111121212 Hình 21 Bi mơ t d li u chu k sóng Tp thu th c theo th i gian t m ff50 104 LÝ L CH TRÍCH NGANG H tên: c An 09/05/1984 Thanh Hóa a ch liên l c: 68/17 Lê Th Hoa, khu ph 3, Th ng Bình Chi u, thành ph c, Thành ph H Chí Minh S n tho i: 0938.033.616 Email: ldan.sdh19@hcmut.edu.vn O T 2003 2008: Sinh viên T 09/2019 i h c Th y l i n nay: H c viên cao h c ngành Xây d ng cơng trình th y t i iH i H c Qu c Gia TP.HCM Q TRÌNH CƠNG TÁC T i Công ty C ph n Xây d ng 43 thu c T ng Công ty xây d ng Th y l i T ct v n xây d ng Vi t Kim Long T tháng 12/2010 n nay: công tác t i Chi c c Th y L i Phát tri n nông thôn Thành ph H Chí Minh S Nơng nghi p ... to a section of Phan Thiet coastline in Binh Thuan province viii L Lu A TÁC GI cv Nghiên c u di n bi ng b bi n b ng mô hình tốn s Áp d ng vào khu v c b bi n Phan Thi t, t nh Bình (Numerical... n nghiên c u c) Áp d c d) K t qu d ki n 2014 2018 n b bi n nghiên c u n bi ng b bi n nghiên Ch y u dùng mơ hình tốn s x lý s li c có s n Khu v c b bi n Thành ph Phan Thi t, t nh Bình Thu n Hình. .. Mã s : 60580202 TÀI Nghiên c u di n bi ng b bi n b ng mơ hình tốn s Áp d ng vào khu v c b bi n Phan Thi t, t nh Bình (Numerical study on shoreline change Application to a Phan Thiet shoreline