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Back南部水情今年可比北部更穩定 水利署:南部體質補得很「勇健」
南部水情今年可比北部更穩定 水利署:南部體質補得很「勇健」
NEWS
自由时报23 minutes agoBusiness2 min readChinaView translation

南部水情今年可比北部更穩定 水利署:南部體質補得很「勇健」

水利署長林元鵬表示,今年南部供水體質不同以往,透過珍珠串計畫與備援水井,南部水情今年看來可以比北部更穩定。

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水利署長林元鵬指出,受惠於曾文-南化聯通管正式通水及備援抗旱水井,串連三大水庫靈活調度,今年南部供水體質大幅改善,枯水期水情有望比北部更穩定。

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Why It Matters

往年南部進入冬季枯水期容易水情緊繃,水利署透過珍珠串計畫等多元抗旱措施強化供水能力。

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曾文水庫。(資料照)

〔記者廖家寧/台北報導〕往年南部進入冬季就是枯水期,容易水情緊繃。談及今年南部水情,水利署長林元鵬指出,現在南部供水調水系統體質已不同以往了,今年一大關鍵是珍珠串計畫的曾文-南化聯通管正式通水,也就是說,今年豐水期間從南化水庫送至曾文儲存的水,將可以在枯水期間靈活調度,南部水情今年看來可以比北部更穩定,「疫苗打那麼多隻、補品吃一堆,現在體質跟以前不一樣了,很勇健!」

林元鵬說明,今年曾文-南化聯通管已經完成了,這是很大的關鍵,過去曾文-烏山頭水庫系統及南化水庫系統是分別的兩個系統,一個供應南台南、一個供應北台南,過去是兩個水庫系統無法串連,但今年聯通管運作後,三座水庫可以串連統籌、靈活調配,當庫容量較小的南化水庫滿庫時,就可以送至庫容量非常大的曾文水庫「儲水」,三座水庫連通下,枯水期就可從高雄送水到台南,台南出水就可以減少。此外,前幾年百年大旱、南部大旱期間,高雄挖了一百多口地下水、伏流水的備援抗旱水井,今年南部水情可期穩定。

南化水庫庫容量較小,滿庫時蓄水量約8181萬噸,而曾文水庫系統庫容量約4億5000萬噸,加上南化水庫可透過旗山溪越域引水,其實蓄水率回升速度較快,過去常見南化水庫滿庫時,曾文水庫還有大量的多餘儲水空間。

今年正式通水的曾文-南化聯通管具備「雙向調度」功能,也就是說,豐水期間當南化水庫滿庫時,就能透過曾文-南化聯通管調度,將南化水庫的水源引水至庫容量大5.5倍的曾文水庫蓄存,枯水期間當南化水庫蓄水率下降時,就可再從曾文水庫調水支援。

綜觀全台水情,林元鵬指出,依氣象署預報,未來一季降雨預測是「正常偏多」,但秋冬降雨集中在北部、東半部,中南部則進入乾季,另依據歷史資料,極強聖嬰發展年的隔年春季降雨有偏多的情形,但實際降雨仍有變數,考量明年春耕用水需求,水利署審慎因應,但多年來水利署持續透過珍珠串計畫、開闢備援水源等多元抗旱措施強化供水能力,「已經比過去強很多了」,因此對未來水情是「審慎樂觀」看待。

林元鵬補充,枯水期末的梅雨降臨時機已是不確定因素,過去梅雨通常在五月中旬發生,但近年來氣候變遷下梅雨常延後至六月,甚至有空梅的可能性,所以水利署盤點水源會考慮到明年6月底,保守因應做好枯水期及明年春耕的供水準備,但審慎樂觀看待未來水情。

Open Questions

  • 未來實際降雨量是否符合氣象預報?
  • 明年春耕的實際用水需求為何?

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This article was originally published by 自由时报.

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