推荐回答(2个)
湖北省地处长江中游,因在洞庭湖以北而得名,居东经108°21ˊ~116°07ˊ,北纬29°05ˊ~33°20ˊ之间。
湖北东连安徽,南界湖南、江西,西部与重庆市接壤,北接河南,西北和陕西毗邻,东西长约740.6公里,南北宽约470.2公里,版图面积约18.59万平方公里,约占全国国土总面积的1.95%。湖北地处中国地貌第二阶梯与第三阶梯的过渡地带,地势为西高东低,西、北、东三面环山,外高、内低,向南敞开,形成一个不完整的盆地。大巴山脉在本省境内的最高峰—神农顶的海拔3105.4米,为华中最高峰,有“华中屋脊”之称。 湖北地貌以山地丘陵为主,根据海拔高度、形态特征,全省地貌可划分为平原、岗地、丘陵、山地4种类型,分别占19.87%、13.16%、22.59%和44.38%(《湖北省土地利用总体规划》修编办公室,1998)。湖北省地处北亚热带和中亚热带北段,北部接近我国北亚热带的北界,南跨越中亚热带的北界。处于我国东部季风气候区,属典型的亚热带季风气候,具有光能充足、热量丰富、无霜期长、降水丰沛、雨热同季等特点。由于境内地形结构复杂,导致地区气候差异较大,形成一些各具特点的小气候区域(中国自然资源丛书编撰委员会,1995)。
湖北省地处亚热带季风气候区,降水充沛,属于湿润带,局部地区甚至属于多雨地带。因而河流水源补给充足,境内以长江、汉江为骨干,接纳了省内干余条中小河流。长江从重庆巫山县入境,浩荡东流,横贯全省,至黄梅县出境长达1061公里。汉江自陕西蜀河口入境,由西北向东南斜贯省内,于汉口汇入长江,省境长878公里,是湖北省第2大河流。省内河长在5公里以上的中小河流共有1193条,总长度达35130公里,通航里程10000余公里。全省水资源数量较为富裕,但因受水气来源和地形条件的影响,地区分布不均,各地丰歉程度不一。
湖北成土的自然地理和生物气候条件复杂、成土母质多种多样,因而土壤类型繁多,表现出南北过渡地区特征。全省土壤分可分为11个土类,土属137个,土种455个。
湖北地处亚热带,位于典型的季风区内。全省除高山地区外,大部分为亚热带季风性湿润气候,光能充足,热量丰富,无霜期长,降水充沛,雨热同季。全省大部分地区太阳年辐射总量为85-114千卡/厘米2 。多年平均实际日照时数为1100—2150小时。其地域分布是鄂东北向鄂西南递减,鄂北、鄂东北最多,为2000—2150小时;鄂西南最少,为1100—1400小时。其季节分布是夏季最多,冬季最少,春秋两季因地而异。全省年平均气温15-17℃,大部分地区冬冷、夏热,春季温度多变,秋季温度下降迅速。一年之中,1月最冷,大部分地区平均气温2-4℃;7月最热,除高山地区外,平均气温27-29℃,极端最高气温可达40℃以上。全省无霜期在230-300天之间。 各地平均降水量在800—1600毫米之间。降水地域分布呈由南向北递减趋势,鄂西南最多达1400—1600毫米,鄂西北最少为800—1000毫米。降水量分布有明显的季节变化,一般是夏季最多,冬季最少,全省夏季雨量在300—700毫米之间,冬季雨量在30—190毫米之间。6月中旬至7月中旬雨量最多,强度最大,是湖北的梅雨期。
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