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少年河-
沒想到河川重整可以如此有趣
Young Man River--Who knew river restoration could be so much fun? 
 

麗莎瓊斯 著 06.28.00

  對西科羅拉多州剛尼森河北叉流域而言,好壞消息參半。

  一方面,它發源於地球上最美的溪谷之一:自Ragged山與西麋鹿山區流出,而後湧入寬廣平坦的北叉溪谷。

Gunnison River

優美的剛尼森河/麗莎瓊斯 攝

  在另一方面,幾十年來,此河已被過度剝削。在山谷中星羅棋布的煤礦場、牧場、及果園,以廉價而破壞生態的方式取用著河水。在Paonia及Hotchkiss二小鎮間長12哩的河段間,有三個採石場在此運作(科羅拉多州是少數仍允許在河中開採砂石的地區之一)。從1948到1980年間,此郡挖掘了一條深渠,並藉此控制洪水及取得農業住家的用地。如此一來,水道受到了破壞,天然曲流消逝,河岸也受到嚴重的侵蝕。

  可喜的是,有位精力充沛而快活的工程師,傑夫克雷,重整了北叉流域。最近的某天下午,他著了膠鞋及Carhartt牌牛仔褲,越過Htochkiss的大道,躍上他的拓荒車,駛向河畔。

  「這條河相當具有潛力!」他高興地喊著。傑夫熱衷於他的工作,其原因顯而易見。太陽高掛。重整後的河岸邊佈滿傑夫親自移植的紅柳。淺而清澈的河水,在傑夫利用7人座重型卡車細心重整的砂礫堆間流過。藍天之下,西麋鹿山區佈滿新雪。

源起

  1996年,當一位喚作凱文康柏的農場主人號召北叉區關心當地生態的居民時,傑夫首度參與了此一計劃。其時,每一個人---從農場主人、環境學者、玩皮艇的人、果農、砂礫商、灌溉工、河濱地主、到一般關心的民眾---達成了希望減輕侵蝕問題的共識。他們成立了北叉區改良協會,聘請身為工程師的傑夫,對河床的形態進行研究。

  他完成了此一研究,但並沒有因此而結束工作。這終日在戶外奔波的男子恐怕上了癮。他開始募款以求作更多的事,最後共募得美金34萬及來自24處的等值捐獻,這些提供者包括政府機構、環境組織到煤礦公司。他與三家砂礫商協調,使其中二家移出河床區,遷入洪氾平地。

Jeff Crane

傑夫克雷---如果你擁有他的工作,你也會咧嘴一笑/麗莎瓊斯 攝

  傑夫儘可能地號召當地人。鄰近之Grand Junction地區Mesa州立學院的學生可以修一學分的生物工程學,其內容包含與傑夫工作四天,及與由傑夫所引介的專家進行一天的研討。當地的中學生還為此計劃建檔並製作網頁。 

健全的引水系統

  如今傑夫正在監督一項新的灌溉工程,此一建設能有效地為當地的農夫及牧場引入足量的水。到目前為止,當地的引水方式是將推土機駛到河道的中央,挖出一條大的渠道。然而,這種方法相當沒有效率,它為當地人引入了他們有權取用之水量兩倍的水。雖然不為農夫及牧場主人所有的多餘用水最終仍會流回河中,但將這些水引出河道的過程已對生態系統造成了威脅。

  「並不是當地人不在乎。」傑夫提到。「原因出在他們沒有經費。」在傑夫取得10萬元興進新的引水系統後,此一問題便迎刃而解。

Jeff Crane on a rock

 令愛斯基摩人快樂/麗莎瓊斯 攝

  傑夫也重整河段,創造出曲流、沼澤地、迴水區、及洪氾平原,並以柳樹和白楊進行水土保持。他向下挖鑿河岸,重新配置岩石,以為鱒魚建立棲息地。為了替當地玩皮艇的人造波,他還特別留下了一大石塊。

  「我正試著找尋魚類棲地、划船區、野生動物棲息地間的平衡。」他表示。「並藉由引水系統維持此山谷中的農業,所以我們這沒有共治原則,所以,在這河邊你看不到成群的出租公寓。」

  他知道他在說些什麼。在1994年遷入此地前,傑夫是一位企劃工程師,負責土地分配與丹佛市外一處豪華高爾夫球場的道路開發「我覺得噁心。」他說。之後他去了非洲幾個月、在阿拉斯加鮭魚工廠工作了一段時間、搬到佛蒙特,最後定居於北叉谷,決心就算得撿蘋果為生,也要住在此地。但事實沒有那麼糟。傑夫找到了培育工作並參與許多河流重建課程。

  結果相當成功。如今,他得到一份完美的工作---新河的設計家。他必須整日在外、植柳樹及白揚、搬運岩石、與人們交談。「我正試著避免做出與過去十五年所建造相同的東西。」他談到。「我相當快樂。」

 

麗莎瓊斯是居住於西科羅拉多的環保作家。她的作品曾出現於High Country News、 the Christian Science Monitor、 the San Francisco Chronicle,及 the former Buzzworm magazine.

全文與圖片詳見:http://www.earthday.net/grist/limb/limb062800.stm

版權歸屬Earth Day Network,環境信託協會(李佳家 譯,吳海音 審校)

中英對照全文詳見:http://news.ngo.org.tw/issue/
water/issue-water00081401.htm

 

 

by Lisa Jones 06.28.00 

As far as the North Fork of the Gunnison River in western Colorado is concerned, there's good news and there's bad news.

On one hand, it drains one of the most beautiful valleys on the planet -- its headwaters tumble from the Ragged and West Elk mountains into the broad, gentle North Fork Valley.

(The Gunnison River -- ain't it pretty?Photo: Lisa Jones.) 

On the other hand, the river has been used hard for decades. Coal mines, ranches, and orchards dot the valley, each of them diverting water, often with cheap and ecologically destructive methods. There are three gravel operations in the 12-mile stretch of river between the little towns of Paonia and Hotchkiss. (Colorado is one of the handful of states that still allow in-stream gravel mining.) From 1948 until about 1980, the county controlled flooding and secured land for agriculture and housing by bulldozing a deep channel straight down the river. The result is a badly degraded waterway whose natural meanders have been erased and whose banks have been severely eroded.

Good thing there's a supernaturally energetic and cheerful engineer named Jeff Crane working to rehabilitate the North Fork. On a recent afternoon, he bounces across Hotchkiss's Main Street in rubber boots and Carhartt jeans, fairly leaps into his Pathfinder, and drives to the riverbank. 

"This river has so much potential!" he shouts happily. He loves his job, and it's easy to see why. The sun is high. The reconfigured banks are fringed with red willows that Jeff transplanted himself. The water, low and clear, is making its way through mounds of gravel being rearranged by a septet of heavy vehicles, under Jeff's careful guidance. And under an exuberant blue sky, the West Elk Mountains are dusted with new snow.

How It All Began

Jeff first got involved with this project in 1996, when a rancher named Calvin Campbell convened a group of locals concerned about the state of the North Fork. Everyone -- ranchers, environmentalists, kayakers, orchardists, gravel miners, irrigators, riverfront landowners, and average concerned citizens -- agreed they wanted to reduce erosion. They formed the North Fork River Improvement Association and hired Jeff, a civil engineer, to conduct a morphological study of the riverbed.

He completed the study, but didn't stop there. The longtime outdoorsman was hooked. He started raising money to do more, garnering some $340,000 in cash and in-kind contributions from 24 sources, ranging from government agencies to environmental groups to coal mines. He talked to the gravel-pit operators and got two of the three to move their operations out of the streambed and into the floodplain. 

(Jeff Crane -- you'd grin too if you had his job.Photo: Lisa Jones.)

He has involved as many local people as possible. Students at Mesa State College in nearby Grand Junction can take a one-credit course in bioengineering, which involves working with Jeff for four days and taking a day-long workshop from an expert Jeff brings in. Local high school kids have made documentaries and web pages on the project.

A Healthy Diversion

Today Jeff is overseeing the construction of a new irrigation structure, which will efficiently divert the amount of water allocated to local farmers and ranchers. Up until now, water was diverted by driving bulldozers into the middle of the river and plowing out a big dike. This method was quite inefficient, though, and it diverted about twice as much water as the locals were entitled to. The excess water not owned by farmers and ranchers would eventually flow back into the river, but the fact it was taken out at all stressed the ecosystem.

"It's not that the people don't care" says Jeff. "It's that they didn't have any money." He solved that problem by securing a $100,000 grant for constructing the new diversion structure.

(Keeping the kayakers happy.Photo: Lisa Jones.)

Jeff is also reconfiguring sections of the river to have meanders, wetlands, backwaters, and floodplains, all made stable with willows and cottonwoods. He makes undercuts and arranges rocks to create trout habitat. He is saving one big rock to make a wave for local kayakers.

"I'm looking to strike a balance -- fish habitat, boating habitat, wildlife habitat," he says. "And to divert water to sustain agriculture in this valley, so we don't have a bunch of condominiums lining this river."

He knows what he's talking about. Before moving to the area in 1994, Jeff was a project engineer who platted lots and developed roads for a luxury development on a golf course outside Denver. "I got disgusted," he says. He went to Africa for a few months, spent some time in Alaska working in a salmon cannery, moved to Vermont, and finally landed in the North Fork Valley, determined to make a life here even if he had to pick apples. But it didn't come to that. Jeff found some development work and attended numerous river-restoration courses.

It all paid off. Now he's got the perfect job -- designer of a new river. He gets to spend his days outdoors, planting willows and cottonwoods, moving rocks, talking to people. "I'm trying to prevent the same thing I spent 15 years building," he says. "I'm as happy as could be." 

 

Lisa Jones is an environmental writer living in western Colorado. Her work has appeared in High Country News, the Christian Science Monitor, the San Francisco Chronicle, and the former Buzzworm magazine.

http://www.earthday.net/grist/limb/limb062800.stm

 

 
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