【題目】通常把地球上的__________資源稱為水資源。____________和____________是我國主要的淡水資源。
【答案】淡水 河流水 淡水湖泊水
【解析】
根據(jù)地球上的水,97%是海洋水,而人類所需的淡水資源僅占全球水量的2.5%;目前人類利用的淡水資源,主要是江河湖泊水和淺層地下水。我國水資源的時空分布情況受我國降水的影響,我國降水空間上來說從東南沿海向西北內(nèi)陸降水逐漸減少,導(dǎo)致我國水資源東多西少、南多北少;我國水資源時間分配上具有夏秋多,冬春少和年際變化大的特點,進行分析解答。
通常把地球上的淡水資源稱為水資源,我國主要的水資源是江流水、淡水湖泊水和淺層地下水。我國水資源的時空分布情況受我國降水的影響,夏秋季降水豐沛,河流處于汛期,水資源較為豐富,但容易造成澇災(zāi)害; 春冬季降水少,河流處于枯水期,水資源相對不足。
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