Since the restart of the Grand Canal in the Ming Dynasty，Huanghuai Yunshui system intersects in the Hongze Lake area，The official will gradually cure yellow、Governance and Huaihuai concentrated in one。Building a embankment for the waters of the Yellow River，Dazhu Gaojiayan in Hongze Lake，Make Huaishui flow and increase the water level，Make the lake water in the clearance to clear yellow，Will cross the boat to cross yellow，Brush the deep Yellow River at the same time。Clear from this period，It is the water flow control center of the entire Huanghuaiyun。This governance mode causes expansion of Hongze Lake。Due to the heights of the bottom of the lake and the Yellow River body，Building high in Gaoyan，Huanghuai Yunhu Lake forms many crises。

First，Gaojiayan system continues to build，Changes in the water environment。The first and middle period of the Qing Dynasty，The bottom of the lake is not deep，The Yellow River is not high，Gaoyan is not dangerous。With the rise of the bottom of the lake and the Yellow River,，Infuse of the Yellow River，Lead Huang Qianghuai weak。Qianlong Fifty years (1785) is an important division point。Former lake water can be brushed yellow and good luck，This year's lake dried up，clear mouth cannot cross the transport，Official citation Huang Jiyun。With the increase of the Yellow River body，Yuhuangba long -term closed and regular irrigation ponds，Huai Shui is difficult to get out of the mouth and enters yellow，More from Gaobao Zhuhu Lake bet365 best casino games from Gaoyan Wuba District。Guantang Jiyun was performed in the period when Huang Gaoyuqing，A combination of Kaiba Tongyu, which is generally higher than the yellow period。Huang is higher than Qing，Guantang Ji Yun; Clear higher than yellow，Qiba Tongyu。Official measures，To try to adjust the water level of the lake and the Yellow River，So as to clear water。Clear from this period，Even the state where clear yellow cannot meet。Starting from the Jiaqing period，Gaoyan Wuba District has begun to become the control point of upstream and downstream water flow，Ji Yun Yunyun through various dams of storage lakes，You can control the downstream return to the river and the water flow。Officials must have a sensitive response to the upstream and downstream water potential，Make countermeasures in time。

The official often closed Royal Huangba began in the 14th year of Jiaqing (1809)，Due to the backfill crisis at the time，Official blocking Royal Huangba，Quanhuai Jiyun。As time closing the dams becomes longer and longer，The degree of leakage of Quanhuai increases，Dangerous increase in the water leakage passage of weir dams，The degree of the flood in the lower river area of ​​the Li River increased。The official closed royal Huangba during the lucky transport，In the autumn and winter, the dams of the dams of the weir are clear，Northwest Wind Qi，endangering dam weir。Hechen are still leading yellow into the lake to help clean water，With the increase in the general frequency of Yellow Henan，The water volume of Huaihuai Huaihuai Huaihuai Lake also increases，Mainstream slowing，The river body is more stubborn and raised。Gaojiayan also continues to build high，Increased frequent frequency。In bet365 live casino games order to storage，Jiaqing 17th year Baiqian minus Huang Xuqing。Official passing yellow，The Qingshui of the Qingkou District is strong to get lucky to get lucky。

2，The Qing government not only controls Huanghuai Water Love through Qingkou and Shanyao Dam，It also controls the overall situation through several water conservancy control lines centered。Gaoyan and Dam systems are the first control line，The Canal embankment is the second control line，Fan Gongdi is the third line。Shi Yan called it upper flow、midflow、Lower。The Dam System of the East Bank of the Canal can be used as the midstream control line，It has a significant impact on downstream。19th year of Kangxi (1680)，Fu Jin in Gaoyou、6 dams reduced by the East Division of the Jiangdu Canal。Kangxi's 3rd Southern Tour，I believe that the focus of the decision has been moved to south of Gaoyou，Block the dam gates north of Gaoyou。Beiba south to reflect the phenomenon of high bonded and drainage channels in the north。Qianlong 23 years，Five dams formed on the dike，That is Wuli Zhongba、Zhaoguanba、Car Loguang Dam、Nanguanba、Nanguan Xinba，Totally referred to as Guihai Wuba。Huaishui from returning to the sea，Far two or three hundred miles，Add the same terrain in the bottom of the lower river area，This area naturally becomes a place where the frequency of water suffers。In this environment，During the Daoxian years, the official enhanced the channel of Huaishui into the river。Before this，Officially guide Huai Shui Water into the yellow and return to the sea through the canal of the canal。Entering the Yellow River is difficult to diversion due to the increase of the Yellow River，Water floods in the canal area increased bet365 best casino games due to the increase in water leakage，Officially entered the river channel，Most of the Huaishui in the flood season enters the river。Official control through the time of leakage of water leakage through the dam of Gaoyan，Prevent the lower river area and the riverside regions in the river in the river in the early rice downs in the early rice.。Another，When the river enters the river, it encounters the riverside roof.，The official in order to keep Gaojiayan and Yun Dao，It is also necessary to open the Dam of the canal to leak the water to the sea，At this time，There is a comprehensive large -scale water disaster in the lower river area of ​​the Lixia River。In short，The more you reach the post，Huai Shui has become a tributary of the Yangtze River。1952 Northern Jiangsu irrigation general canal repair，Only a small part of the Huaihe River is directly flowing into the sea，This is the situation in Daoxian years。

third，East of the Canal to the River、The vast area west of Fan Gongdi，With the increase in the flood season during the Ming and Qing Dynasties，Rathematical growth of Putian and Duitian。The Putian system in this area has been formed during the Tang and Song dynasties。After repairing the dikes of a Fan Gong in the coastal area，Low ground can steadily avoid tide，Putian system can develop。Earlier paddy fields developed in the flat low land，about 1500 years of history，At that time, the rice fields were formed under the field of reclamation under the Tuitian organization。The fields on the edge of the lake are about 1270 years of history，It is a field formed by the middle of the Tang Dynasty，The canal system was perfected at that time，River Net formed，Low Tian forms a Putian rice field on the basis bet365 Play online games of discharge irrigation。After the Yellow River sees Huai Huai, Xinghua's newly formed History has 520 years。400 years ago，Start a large number of Ding Tian。Beiba South Qianhe Huaishui enters the river channel to increase the water volume greatly，Make the Putian system develop in the south。Low -lying Xinghua area Four Water Gathering，Need to build Gaoguang Bank。But，Flood and water enables many dry fields to develop into a Putian rice field。Qianlong、Jiaqing period，The water conservancy measures in the lower river area of ​​the Lixia River have continuously developed Putian and rice work。Daoguang to drop，Huaishui returns to the river and the amount of water increases sharply，Jiangdu County began to build a large number of Putian。Putian built began in Yancheng、In the territory of Xinghua County，progressive to the southwest，Baoying、Gaoyou Er County forms a re -development of Putian，Finally, the development of Putian formed in the Binjiang area。Gaoyou Sanba and Ganquan Zhaoguanba are open，Xinghua and Taizhou are all flooded。Early affects early rice，Retreat from time to time affects late rice。Just the official can control the period of the leakage to prevent downstream water from suffering，Locals will also harvest early rice in time to prevent water prevention。Water floods often affect medium rice and late rice。To prevent opening the dam and the middle and late rice after the autumn，There are many familiar morning rice in the low -lying area of ​​the lower river。Floods and water forming low -ground gully and many surfaces，Conditions for the formation of Duotian。Xinghua Middle and Western Region，The stasis beaches that are not under the Bet365 lotto review water all year round can expose the water on a large scale when dredging the waterway during the flood period，The plot with a small area of ​​the water surface forms a dumplings。This kind of Tian Tiangou is very deep，Field face is very small，Can deal with large -scale leakage。Farmers can also use lake silt stacking stacking padded fields。

To sum up，The changes in the water environment of Huanghuayun in the Ming and Qing Dynasties made the lake at the bottom of the lake of Hongze Lake，The Yellow River River is raised。To ensure the smooth flow of the canal and the governance of the Yellow River，Officially cultivated Gaoyan to storage and brushing yellow，Make Qingkou a water flow control center。With the high bonding of the Yellow River、Increases of Quanhuang Lake，The entire situation is no longer running in the early days with the ecological governance mode of clearing yellow brushing yellow。This change has prompted the official to focus on the water flow control point in the mountains of the mountains，A new control point here。In order to prevent the flood in the lower river area，The official has increased the leakage of the riverside channel，At the same time, controlling the damage of the dam of the dam at the same time。The Putian system and Duitian in northern Jiangsu also increased in this environment。During the process of closing the dam and Qiba every time，Hechen are considering the changes in the water environment of the entire Huanghuai Lake，At the same time, consider the safety of the canal of the country and the people of the people。In short，The ancient Chinese concentrated the governance of Huanghuai Yun Lake at a little bit of Qingkou or Shanyu Wuba，Then use 3 control lines to reach a large range Bet365 lotto review of water environment governance controllability，This is an unprecedented ecological governance wisdom。

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