Argentina

Argentina - Glacier Threat Mar 1985 UNDRO Information Reports 1-4

Format
Situation Report
Source
Posted
Originally published


UNDRO 85/0596
ARGENTINA - GLACIER THREAT
UNDRO INFORMATION REPORT NO.1
15 MARCH 1985

1. UNDRO/UNDP RESREP ADVISED ON 14 MARCH 85 POTENTIAL BREAK OF 540 METER-THICK GLACIER IN RIO PLOMO, MENDOZA PROVINCE WHICH RECENTLY ALSO STRUCK BY EARTHQUAKE. ACTUAL BREAK WOULD RESULT IN FLOODING IMPORTANT INDUSTRIAL AND POPULATED AREAS AND HAVE DRAMATIC CONSEQUENCES FOR WATER SUPPLY OF ESTIMATED 500,000 PEOPLE.

2. AT REQUEST OF GOVERNMENT RESREP ASKED UNDRO ASSISTANCE IN IDENTIFYING AND, IF POSSIBLE, IMMEDIATE FIELDING OF GLACIER MOVEMENT CONTROL EXPERT.

3. THROUGH CONTACTS WITH SWISS DISASTER UNIT, BERNE, HIGHLY QUALIFIED EXPERT FROM FEDERAL INSTITUTE FOR GLACIER MOVEMENT CONTROL AT ZURICH UNIVERSITY NOW AVAILABLE AND EXPECTED TO ARRIVE IN BUENOS AIRES ON 20 MARCH 85 FOR INITIAL TWO-WEEK PERIOD.

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UNDRO 85/0681

ARGENTINA - GLACIER THREAT
UNDRO INFORMATION REPORT NO. 2
26 MARCH 1985

1. UN FACT-FINDING MISSION COMPLETED BY GLACIER MOVEMENT CONTROL EXPERT.

2. NO IMMINENT DANGER DETECTED BUT RISK OF DETERIORATION WITHIN NEXT SIX MONTHS. PREVENTION PLAN IS PREPARED WITH ARGENTINE AUTHORITIES. DETAILS WILL FOLLOW.

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UNDRO 85/0767

ARGENTINA - GLACIER THREAT
UNDRO INFORMATION REPORT NO. 3
04 APRIL 1985

ASSESSMENT OF SITUATION

1. AT PRESENT NO MOVEMENT OF GLACIER. LAKE FORMED BEHIND GLACIER PRACTICALLY EMPTIED, NO IMMEDIATE FLOOD DANGER. SHOULD HOWEVER LAKE GROW CONSIDERABLY WITHIN NEXT FEW WEEKS, FLOODS CANNOT BE EXCLUDED WHICH WOULD CAUSE HEAVY DAMAGE TO AGRICULTURE AND COMMUNICATIONS NETWORK.

MEASURES OF PREPAREDNESS AND PREVENTION

2. EXPERT DELEGATED BY UNDRO AND FINANCED BY SWISS DISASTER UNIT HAS IDENTIFIED FOLLOWING PREPAREDNESS MEASURES: (A) ALERT SYSTEM BASED MONITORING BY SURVEILLANCE TEAMS ALREADY OPERATING. THIS SHOULD ALLLOW EVACUATION OF POPULATION IN TIME, (B) CREATION OF A GALLERY THROUGH THE ROCK BESIDE THE GLACIER WHICH WOULD MAKE IT POSSIBLE TO KEEP WATER LEVELS WITHIN ACCEPTABLE LIMIT, (C) ALTERNATIVELY CONSTRUCTION OF A FLOOD RETENTION DAM IN THE RIVER VALLEY BELOW THE GLACIER, OR (D) EMPLACEMENT OF AN ARTIFICIAL MORAINE IMMEDIATELY BEHIND THE GLACIER.

3. FROM LATTER THREE ALTERNATIVES (B) IS A SHORT-TERM SOLUTION AND (C) AND (D) ARE LONG-TERM AND MORE COSTLY.

4. UNDRO HAS OFFERED THE GOVERNMENT ITS ADVICE AND ASSISTANCE IN SELECTING THE ABOVE PREPAREDNESS MEASURES AND IN EXPLORING THEIR POSSIBLE FINANCING.

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UNDRO 85/1026

ARGENTINA - GLACIER THREAT
UNDRO INFORMATION REPORT NO. 4
8 MAY 1985

ASSESSMENT OF SITUATION

ON BASIS OF CONSTANT SURVEILLANCE CARRIED OUT AT GLACIER SITE, MENDOZA PROVINCE AUTHORITIES REPORT WATER CONDUITS IN A GLACIER STILL OPEN. THEREFORE NO LAKE FORMING AT PRESENT BEHIND GLACIER. NO FURTHER GLACIER MOVEMENT. GLACIER PRESSURE AGAINST ROCK NOT INCREASING. REPORT BY COMMITTEE OF GLACIOLOGISTS AND HYDROLOGISTS ON PROTECTION MEASURES SCHEDULED FOR MID-MAY. REPORT WILL BE AVAILABLE AT UNDRO ON REQUEST.

THIS IS THE LAST UNDRO INFORMATION REPORT ON THIS SUBJECT.

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