Tieu ban: Cdc Khoa hoc vi Trdi ddt ISBN: 978-604-913-016- CAC GIAI PHAP QUAN LY T A N G CHITA NU^OC VEN BIEN BINH T H U A N T R O N G BOI C A N H BIEN DOI KHI H A U • • SOLUTIONS FOR MANAGING OF COASTAL AQUIFERS IN BINH THUAN PROVINCE IN CONTEXT OF CLIMATE CHANGE Phan Thi Kim Van', Nguyen Thi Kim Thoa', Giuseppe Arduino , Paolo Bono\ Nguyen Van Giang", Biii Tran Vu•g^lg^ Peter Dillon'', Tran Viet Hoan^ Nguyin Thi Nhan^ ^'' Vien Dja Chit, Ngd 84, phi Chiia Ling, Ddng Da H i Ndi, E-mail: ptkvan2Q09@mnail.eom, '2' Vien Vit Ly Dja Ciu, *^' Hydrological/Geologieal Unit UNESCO Office, Jakarta, Indonesia '"^'Tlng hgp "La Sapienza" Rome Italy, '"'Trung tim Dieu tra vi Quy hoach TNN, *^' CSIRO Land & Water, SA, Australia, '^' Vien Dja Chit v i Dja vit ly Biin Tom tat: Bdi bdo trinh bdy kit qua nhdn dugc tir cdc nghien cuu cua hai de tdi "Bd sung nhdn tgo nuac dudi ddt a tinh Binh Thudn (2004-2007), Thich nghi vai bien doi hdu: Qudn ly cdc Idng chira nude ven bien mien Trung Viet Nam (20082010) Muc tieu cua cdc de tdi ndy la: a) Xdy dung mdt du dn thi diem vimg ddi cdt tinh Binh Thudn nhu la thu nghiem cdng nghe bd sung nhdn tgo nuac dirai ddt a Ddng Nam A, b) Ddnh gid cdc gidi phdp vd hiiu qud qudn ly mrac dudi ddt thdng qua cdc cdng nghe bd sung nhdn tgo nuac dirai ddt, c)Chuyen giao kiin thirc vd kinh nghiem tdng cirang ngudn nude bdng cdng nghe bd sung nhdn tgo, d) Cung cdp nude sgch cho cdng ddng viing bj hem Idu ddi, e)Lira chgn cdc giai phdp quan ly tdng chira nuac de cung cdp nuac sgch vimg ven bien bdi canh bien ddi hdu Vung nghien ciru la mdt nhirng vimg khd hgn nhdt ciia Viet Nam, thudc khu vuc ven bien cua tinh Binh Thudn, cdch thdnh phd Hd Chi Minh 200 km ve phia Ddng Bdc Abstract This paper presents the results obtained from two the projects: "Groundwater Artificial Recharge in Binh Thuan Province, Viet Nam" (2004-2007) and "Adapting to Climate change: Managed Aquifer recharge at coastal zone in Central Part of Vietnam " (2008-2010) The objectives of these projects are: a) lo build up an experimental pilot project in the sand dune area of Binh Thuan Province, as an example of artificial recharge in Southeast Asia, b) to assess methodologies and effectiveness of groundwater management through groundwater recharge technologies, c) to transfer knowledge and experience of augmenting groundwater resources by artificial recharge lo scientists, d) to supply good quality water to the communities periodically affected by longstanding droughts, e) to chose solutions of Management of Aquifer Recharge for Mater's supply in context of climate change in Vietnam The study area is one of the driest part of Vietnam, located in the Binh Thuan Province along the coastal plain in the lower part of Central Eastern Viet Nam 172 Hgi nghi Khoa hgc kv niem 35 ndm Vien KIwa hgc vd Cong nghe Viet Nam - Hd Ngi JO 20JO GIOI THIEU Bii bio trinh biy kit qui nhin duge tir eic nghien cim cua hai de tii "Bd sung nhin tao nude dudi dit d tinh Binh Thuan (2004-2007), Thich nghi vdi biin ddi hiu: Quin ly eic ting chira nude ven biin miln Trung Viet Nam (2008-2010) Mue tieu ciia eic de in niy li: Xiy dung mdt de in thi diem ve Bd sung nhan tao nude dudi dit ciia khu vuc Ddng Nam A o viing cit Binh Thuan, b) Dinh gii he phuong phap va bieu qui ciia quan ly ngudn nude thdng qua cie cdng nghe bd sung nude dudi dit, c) Chuyen giao cie kien thirc vi kinh nghiem cho cic nha khoa hgc Viet Nam ve ting cudng nguon nude dudi dit bing bd sung nhan tao, d) Cung cap nude chit lugng tdt cho cdng ddng din cu d nhirng viing hay bj ban hin, e) Lira chgn eic giii phip quin ly bd sung tang chira vdi muc tieu cung cap nude bdi cinh cua bien ddi hiu d Viet Nam f>./T" ' •'( '"'' Hinh Vi tri khu virc nghiin ciru Viing nghien cim li khu vue ven bien cua tinh Binh Thuin (hinh 1) vi diy li mdt khu vuc khd nhit eua Viet Nam Theo sd lieu mua thu thip tai tram Phan Thiet thdi ky 1925-2007, lugng mua trung binh hing nim li 1,112 mm/nam, vdi cue tieu la 650 mm (1977) vi cue dai la 2,017 mm (1932) Do lugng mua it keo dai thdi gian thing (tir thing 12 den thing 3) nen khu vuc nghien ciru bj khd ban sudt thdi gian Trong dd miia mua ngin, nhung lugng mua ldn nen cd den 70-80% chiy tren be mat Chi mot lugng nhd dugc thim xudng cie cdn cit Chi cd nhirng sdng ldn mdi cd nude miia khd nhung nhin chung nude rit due vi bj nhiem man DAC DIEM THUY VAN VA DIA C H A T THUY VAN Viing nghien ciru duge hinh thinh bdi cic di goe ryo-dacitic tao thinh cie ddi nim cich biet (eao den 300 m so vdi mue nude bien), phii len tren cie di gdc niy li cic trim tich Pleistocene trung {vQ\^) bao gdm eit thach anh miu niu dd kich thude trung binh.tao cae dun cit eao den 200 m so vdi mue nude bien; Cie trim tich bien Pleistocene trung he tang Ma Lim (mQf/»/) bao gdm eat thach anh ilmenite Cac trim tieh biin Pleistocene trung he tang Phan Thiet (rriQ i pt) bao gdm cit thach anh miu ving dd chira biin vi set d cac mirc khie nhau; Cic trim tich Pleistocene thugng (vQ,^), la cie cit thach anh ma ving dd, kich thudc hat trung binh; Cie trim tich Holocene dudi (vQ2'"^) li cit thach anh hat nhd miu tring 173 Tieu ban: Cdc Khoa hgc ve Trdi ddt ISBN: 978-604-913-016-8 din ving nhat Cae trim tieh niy tao thinh eic dun eit miu dd vi tring (cao den 200 m so vdi muc nude bien) phd bien vimg ven bien khu vue phia Bie Phan Thiet (hinh2va3) ii.SC Dl£.M D|.\ TASC \ A TIUCH HOC' VtNG C. Soug Liiy u Ti'jtng Hdo2 Pboiie rrdng BBU Noi Eig II Distribution of seven options on MAR Hinh II Vi tri cdc du dn MAR cd thi triin khai tgi viing cdt huyen Bdc Binh di cdp nuac r r ' - Bom nude tir Sdng Luy ve triing Ti Zon de bd sung bang bdn tham - Bom hiit nude tir ting chiia d khu vuc Bau Trang (bank filtration) ve Bau Ndi _ j ^ ^ g^^ ^^^, ^^^ hiia cac ao, hi hoac nap xudng qua cac Id khoan khu vuc xa Hdng Phong - Khai thac nude dudi dit tir cac suoi khu vuc ven b i ^ trudc chimg thoit biin 178 Hgi nghi Khoa hgc kv niem 35 ndm Vien Khoa hgc vd Cong nghe Viet Nam - Hd Ngi JO 20JO KET LUAN De lira chgn duge eic giai phip quin ly ting chira nude khu vue nghien cim, can thiet phii tien hanh ddng thdi eic khio sit dja chit thiiy van, dja vat ly, liy miu phin tich hda toan phan, ddng vi ben, khoan khai thie thir nghiem kit hgp quan trie chat lugng nude, muc nude thap, xic djnh cie thdng sd dja chit thuy van eua ting chira, xic dinh ngudn nude de bd sung eho ting ehiratren co sd cie kit qui nhin duge se lira chgn giii phip phii hgp vdi vimg nghien cim TAI LIEU THAM KHAO Dillon, P.J (2005) Future management of aquifer recharge Hydrogeology Journal, 13 (1)313-316 Nguyen T.K.Tboa, Giuseppe Arduino, Peter Dillon, Nguyen V.Giang, Phan T.K Van, Bui T.Vuong (2006) Fighting against desertification; Groundwater Artificial Recharge in Binh Thuan Province, Viet Nam Project Report of Vietnamese Academy of Science and Technology to UNESCO at Mexico Nguyen Thi Kim Thoa, Phan Thj Kim Vin, Nguyen Van Giang, Biii Tran Vugng (2010) Nghien cim co sd khoa hgc vi cdng nghe quin ly bd sung ting chiia nude d Viet Nam Nha xuat bin Vien Khoa bge & Cdng nghe Viet Nam 179