SEASONAL VARIATIONS OF RIVERINE ORGANIC CARBON CONTENTS IN MAKOU AND HEKOU GAUGE STATIONS OF THE ZHU

来源 :Chinese Geographical Science | 被引量 : 0次 | 上传用户:skywateren
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Water samples were collected and analyzed in high water season (July 1997) and in middle water season (October, 1997) from two main lower reach gauge stations of the Zhujiang (Pearl) River, namely Hekou and Makou, respectively. Content of particulate organic carbon is always higher than that of dissolved organic carbon in both seasons, which is obviously different from the global average pattern, i.e. dissolved organic carbon is the dominant component of the transported riverine organic carbon. The content of dissolved and particulate organic carbon changes with the water levels in a direct ratio. The percentage of organic carbon in total suspended substance changes with the content of total suspended substance in an inverse ratio. The more intense is the soil erosion in the drainage, the more concentrated is the riverine organic carbon in the river. The contribution of autochthonous organic carbon is larger in high water season than in middle water season. Water samples were collected and analyzed in high water season (July 1997) and in middle water season (October, 1997) from two main lower reach gauge stations of the Zhujiang (Pearl) River, namely Hekou and Makou, respectively. Content of particulate organic carbon is always higher than that of dissolved organic carbon in both seasons, which is obviously different from the global average pattern, ie dissolved organic carbon is the dominant component of the transported riverine organic carbon. The content of dissolved and particulate organic carbon changes with the The percentage of organic carbon in total suspended substance changes with the content of total suspended substance changes with the content of total suspended substance in an inverse ratio. The more intense is the soil erosion in the drainage, the more concentrated is the riverine organic carbon in the river. The contribution of autochthonous organic carbon is larger in high water season than in middle water season.
其他文献
建国以来,河北省人民在中国共产党和人民政府的领导下,为了改变农业生产的面貌,造福于人类,大搞除水害、兴水利、打机井、修灌区活动,积极发展农田灌溉事业。三十五年来,全
同志们: 这次会议的规模不大,时间也不长,但是一次很重要的会议。会议传达了水电部最近召开的各省(市)、自治区水利厅(局)长座谈会议精神;学习了水电部党组在整党中提出的并
新生儿重度窒息是引起围生期死亡及神经系统后遗症的主要原因之一[1],随着新生儿抢救技术的进一步提高,新生儿的病死率逐年下降,而儿童的脑性瘫痪、智力低下等伤残率反而上升[2],为了提
在实验物理学学科中(例如,粒子物理学、光学),详细了解用于研究和探查目标的信号是至关重要的。对地震实验而言,精确确定输入信号在某种程度上还未受到重视。我认为对此问题
中国有13亿人口,跟“吃”有关的生意,只要有绝活,做出特色,卖出创意,永远都有赚不完的钱。最近在河北等地热销的“圣旨骨酥鱼”,就充分地体现了这一点。 China has a popula
1983年7月淮北地区遭到了解放以来罕见的特大雨涝的袭击,但仍然夺取了空前的大丰收,粮食产量创造了历史最高水平。徐州市的6个县,县县增产,全市粮食总产量突破70亿斤,比1982
本文用现代振动分析理论,即试验模态分析方法和模态综合技术,建立了考虑弹性体的汽车平顺性多自由度模型。这个模型以较少的模态自由度较逼真地描述了整车系统,并应用随机振
市场就是一个互动的循环链,循环链环环相扣首尾连接,一个环节“卡壳”,也许可以从另一个不起眼的环节入手。然后用新的环节去拉动“卡壳”的环节。这就叫做生意招招鲜,玩得转
水能资源普查是水电建设前期工作的重要组成部分,是国民经济发展规划和计划的重要基础。从1977年4月至1980年10月,在历时三年多的全国水能资源普查工作中,各有关部门做了大
我们在1993年冬末至1994年春初测定了本院住院肺炎患儿血和尿中铁、锌的含量以及相关生化指标,并以幼儿园和门诊体检的正常儿童作对照。1 对象和方法1.1 研究对象 肺炎组:根据临床症状、