More than 100,000 Dingfu and state soldiers were recruited, and the Baihe River was excavated twice to the Shahe River and the Fangcheng Pass.

Due to the increasing terrain, although the water arrived, it was difficult to transport it by water. Later, the stone weir was washed away by the river water, and the project was stranded.

But the ruins of the canal that was dug back then are still there.

If this Xianghan canal can be built, it will not only connect Xianghan to the Xiangtan canal, but also cross the Fangcheng Mountain watershed and directly connect to Sha and Bian in the Central Plains, and even lead the Han Dynasty to the Yellow River.

Water transportation and irrigation are all things that will benefit the future.

Fangcheng Pass is a natural gap in the north of Nanyang Basin. Fangcheng people call it Fengkou.

Chen Qianfu told the emperor that, in fact, Henan Province had already studied and demonstrated that as long as six feet of digging was needed at the pass, the Han River could be diverted out of the Nanyang Basin and flow northward to the Huanghuai Plain.

The failure of the Northern Song Dynasty had certain technical reasons, but it was mostly due to political disputes.

Nanyang is a huge basin with fertile soil, but precipitation is mostly concentrated in July, August, September, and September, so Nanyang has always had a water shortage problem. If this white sand canal can be built, it will not only make transportation here more convenient, but also the Han River water irrigation

Not only the Nanyang Basin can also help Nanyang's agriculture, making this granary truly rich and stable.

This chapter is not over yet, please click on the next page to continue reading! The construction of canals has been developing very well since the pre-Qin period. The Ling Canal of the Qin Dynasty was even more famous, and then the Sui and Tang Grand Canals and the Beijing-Hangzhou Grand Canal were even more famous.

Needless to say.

Lifting water step by step by building weirs and other means is not a problem at all.

The only things to consider are excavation costs and maintenance costs.

If we just intercept the Baihe River and cross the Fangcheng Pass, we will inevitably have the same problem as in the Song Dynasty, that is, for a long time every year, the canal will not have enough water to allow navigation, and its use value will be greatly reduced.

In order for this canal to truly play its role, the Han River must be introduced, not only to connect the Han River, but also to lift the Han River to the Baihe River and the Tang River. It is necessary to add weirs, dams, water gates, etc., and the soil quality of Nanyang is

Some are expansive soils.

Expansive soil swells when exposed to water and shrinks when it loses water. Building a channel on expansive soil can easily cause the channel to collapse. It's a knife on a sunny day, but a mess on a rainy day.

In the Northern Song Dynasty, the Fangcheng Pass was excavated and weirs and embankments were built, but they were later abandoned. Firstly, there was insufficient water and navigation was often unavailable. Secondly, due to swelling soil, the repaired weirs and embankments often collapsed during the rainy season floods, and were finally abandoned.

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But this is not impossible to solve. The simplest way is to replace the expansive soil with non-expansive soil, dig out and replace the expansive soil along both sides of the canal channel, and transport the non-expandive soil to repair the weir and embankment. It is simple and crude, that is, the amount of work will be reduced.

As the size increases, the cost increases.

There is another method, which is to steam and crush the expanded soil, then use bags to seal it and flatten it, compact it layer by layer, and then lay the second layer. The third method is to mix in other materials, such as glutinous rice slurry, lime, etc.

Become Sanhetu, etc.

In short, just solve the problems that arise.

Chen Qianfu, the governor, intends to promote the establishment and construction of the Xianghan Canal. After it is completed, the Nanyang Basin will not only be more closely connected with Henan, but also drive the development of southern Henan and western Henan. It will also be more conveniently connected through the Xianghan Canal.

The Yangtze River, Han River, and even Xiangtan can also be connected directly to Lingnan via the Lingqu Canal.

The emperor had previously publicly mentioned the need to dig the Jiangxi-Guangdong Canal in southern Jiangxi and Jiangxi. Today, Chen Qianfu also seized the opportunity to mention the Xianghan Canal.

"You can first establish a project initially, do some preliminary work, do some exploration and research, and determine the feasibility and preliminary budget for excavation, maintenance and other costs."

Zhu Yihai didn't veto it, nor did he directly agree, but he left an opening. Now that he didn't have the conditions to do it directly, he could do some preliminary research first.
Chapter completed!