【題目】讀黃河水系圖,回答后面的問題。

(1)黃河發(fā)源于 山脈,注入 海。

(2)序號②是 平原,河段④由于泥沙淤積,河床抬高,很容易形成“ ”。

(3)治理甲區(qū)域生態(tài)環(huán)境問題的根本措施是 ,山脈乙的走向是

(4)列舉黃河上游的主要問題: 。

【答案】(1)巴顏喀拉 渤

(2)河套 地上河

(3)在中游黃土高原地區(qū)開展水土保持綜合治理(言之有理即可) 東北至西南

(4)氣候干旱,草場退化,荒漠化嚴(yán)重,凌汛。

【解析】(1)黃河發(fā)源于青藏高原的巴顏喀拉山,注入渤海。

(2)序號②是河套平原,黃河下游流經(jīng)的地形區(qū)是華北平原,成為舉世矚目“地上河”,原因是黃河從中游黃土高原帶來大量的泥沙進(jìn)入下游,下游流速減慢,地勢低平,泥沙堆積,河床抬高,成為舉世矚目的地上河。

(3)黃土高原地區(qū)最突出的生態(tài)問題就是水土流失,治理方法主要是植樹種草,大力加強(qiáng)植被保護(hù),保持水土。

(4)黃河上游,土地荒漠化嚴(yán)重,農(nóng)業(yè)用水過多;中游水土流失嚴(yán)重;下游出現(xiàn)地上河,水旱災(zāi)害頻發(fā)。

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