中国最大的淡水湖（其面积最大和最小时相差80余倍）
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<p style="box-sizing: border-box; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255); margin-top: 0px !important;">鄱阳湖是我国第一大淡水湖，位于我国江西省西北部，面积为3960平方公里。我国第二大淡水湖是洞庭湖，其面积约为2579平方公里，鄱阳湖的面积比洞庭湖大约多了1400平方公里。当然，洞庭湖曾经是我国第一大淡水湖，曾经面积超过6000平方公里，后来由于不断的围湖造田等人类活动，面积不断缩小，退居第二。</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><img src="https://p9.toutiaoimg.com/origin/53f10004fa4c508ad53c?from=pc" img_width="660" img_height="434" alt="我国第一大淡水湖鄱阳湖，其面积最大和最小时相差80余倍" inline="0" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/></p><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; position: relative; text-align: center; line-height: 20px; color: rgb(153, 153, 153); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">鄱阳湖的面积变化</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);">鄱阳湖以3960平方公里的面积，目前位居我国淡水湖泊第一位，但是实际上鄱阳湖的面积是会发生季节性变化的，也就是说并不是任何时刻鄱阳湖的面积都有3960平方公里。鄱阳湖当地有“鄱阳湖洪水一大片，枯水几条线”的说法，也就是说鄱阳湖水面面积，在洪水期和枯水期存在着巨大差异。</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><img src="https://p9.toutiaoimg.com/origin/53ef00056f621e930175?from=pc" img_width="660" img_height="366" alt="我国第一大淡水湖鄱阳湖，其面积最大和最小时相差80余倍" inline="0" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/></p><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; position: relative; text-align: center; line-height: 20px; color: rgb(153, 153, 153); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">鄱阳湖卫星地图</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);">鄱阳湖的面积在夏季洪水期时接近4000平方公里，而在冬季枯水期时却缩小到只有几百平方公里，极端情况下枯水期湖面面积只有洪水期的八十分之一，仅仅留下几条湖沟有水，大面积的湖床裸露，放眼望去，冬季枯水期的鄱阳湖俨然就是一个大草原。那么是什么原因，使得鄱阳湖的面积变化这么大呢？</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><img src="https://p9.toutiaoimg.com/origin/53f1000505d3e028e430?from=pc" img_width="660" img_height="440" alt="我国第一大淡水湖鄱阳湖，其面积最大和最小时相差80余倍" inline="0" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/></p><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; position: relative; text-align: center; line-height: 20px; color: rgb(153, 153, 153); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">枯水期的鄱阳湖</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);">鄱阳湖地区地处我国秦岭淮河以南的亚热带季风气候区，年降水量超过800毫米，降水存在明显的季节变化，也就是说在夏季的时候，由于受到来自海洋的夏季风的影响，降水丰富，为雨季；而到了冬季的时候，由于受到来自内陆的冬季风的影响，降水偏少，为干季。因此，鄱阳湖的水位也就会随着气候的变化而涨落，从而使得面积有明显的季节变化。</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><img src="https://p9.toutiaoimg.com/origin/53ee000572fdc307b2fe?from=pc" img_width="660" img_height="463" alt="我国第一大淡水湖鄱阳湖，其面积最大和最小时相差80余倍" inline="0" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/></p><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; position: relative; text-align: center; line-height: 20px; color: rgb(153, 153, 153); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">鄱阳湖规划图</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);">但是气候因素是一个长期稳定的因素，就算近些年，鄱阳湖流域的降水量有所偏少，也不至于使得鄱阳湖的水位下降的这么低。鄱阳湖的是长江流域的湖泊，长江干流与鄱阳湖连通，在洪水期，鄱阳湖可以调蓄长江的洪水；而在枯水期，鄱阳湖可以补充长江的径流量，那么鄱阳湖水量的减少会不会和长江有关呢？</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><img src="https://p9.toutiaoimg.com/origin/53ef0005763ce7cee291?from=pc" img_width="660" img_height="447" alt="我国第一大淡水湖鄱阳湖，其面积最大和最小时相差80余倍" inline="0" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/></p><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; position: relative; text-align: center; line-height: 20px; color: rgb(153, 153, 153); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">长江流域局部图</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);">通过研究，造成鄱阳湖冬季水位下降明显，面积缩减的原因可能和三峡大坝的建设节流有一定的关系，三峡水利工程建设以后，导致长江中下游径流量趋于平稳，洪水期水量下降，从而使得夏季进入鄱阳湖的水量减少，蓄水不足，到了冬季又要补充长江水量，就出现了面积大大缩小的现象。</p><p style="box-sizing: border-box; margin-top: 20px; margin-bottom: 20px; padding: 0px; border: 0px; color: rgb(34, 34, 34); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; font-size: 18px; text-align: justify; white-space: normal; background-color: rgb(255, 255, 255);"><img src="https://p9.toutiaoimg.com/origin/53f30003459351b6ff25?from=pc" img_width="660" img_height="424" alt="我国第一大淡水湖鄱阳湖，其面积最大和最小时相差80余倍" inline="0" class="syl-page-img" style="box-sizing: border-box; border: 0px; margin: 0px auto 8px; padding: 0px; cursor: zoom-in; max-width: 100%; display: block; border-radius: 4px; height: auto;"/></p><p class="pgc-img-caption" style="box-sizing: border-box; margin-top: 0px; margin-bottom: 0px; padding: 0px; border: 0px; position: relative; text-align: center; line-height: 20px; color: rgb(153, 153, 153); font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", "Helvetica Neue", Arial, sans-serif; white-space: normal; background-color: rgb(255, 255, 255);">鄱阳湖枯水期出露的古迹</p>
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