Yellow River History

The lower course of the Yellow River (Huang Jiang) has varied dramatically in historical times. During the second millennium BC the lower course ran almost northwards. In the next two millennia it swung around little by little like the hands of a clock until, from 1289 to 1324, it was flowing in a southeasterly direction into the center reaches of the Huai River which in turn emptied into the lower Yangzi. Since 1324 it has moved back and forth in an irregular fashion, and at present again debouches north of the Shangdong peninsula. The primary cause of these rapid shifts has been the heavy load of silt carried by the Yellow River.The Huang He (yellow) river stretches across China for more than 2,900 miles. It carries its rich yellow silt all the way from Mongolia to the Pacific Ocean. Also the Chang Jiang river or Yangtze river is longer, stretching about 3,400 miles across central china. The two major rivers both merge together to create a great food-producing area. Although China has to major rivers running through it only 10% of its land is fertile and has rich enough soil to grow crops unlike the 19% by the United States. Also another negative is that China is surrounded by mountain ranges and river valleys, which make it hard for people to travel and trade their crops and live stocks, so they have to mostly rely on their food.Yellow River Forest is located in Allamakee County in northeast Iowa. Its headquarters and recreation facilities are located on county highway B25, approximately 4 miles southeast of Waterville or 3 miles west of Harpers Ferry.The Paint Creek Unit is of primary interest to the recreationist.

Hiking, snowmobile and horse trails and several picnic areas are located on the Paint Creek unit. Several scenic overlooks are accessible by horseback, foot or auto and a large portion of the cross country ski trail system is found here.The first lands acquired for Yellow River State Forest were purchased in 1935 with funds that were appropriated to support the Civilian Conservation Corps (C.C.C.). The original purchase was adjacent to the Yellow River near its confluence with the Mississippi and the name "Yellow River Forest" was appropriate. In 1949, 1500 acres of the Forest was transferred to the National Park Service and became a part of Effigy Mounds National Monument. The larger units of the state forest are now located in the Paint Creek watershed, north of Yellow River. Subsequent land purchases consolidated scattered tracts and today the forest is 8,503 acres in size.Because most land purchased was farmland and pasture, the early management of Yellow River Forest was concerned with protection from grazing, fire and soil erosion. Timber harvests provided material that the C.C.C. used for construction on state parks and other state areas.During the 1940s, most of the open land was planted to trees. The plantations of large pines that can be seen on the forest today are the result of these efforts. The extensive system of fire lanes that provided protection to these plantations serves today as part of the recreational trail system for hiking, cross country skiing, horse riding and snowmobiling.In 1947, a sawmill, which the Forestry Division continues to operate was moved to the Paint Creek Unit from Pikes Peak State Park. All the trees processed at the mill are harvested from state land and the lumber used on state parks and wildlife areas, other DNR areas, sold to other state agencies or sold to private individuals. About $20,000 worth of lumber is transferred each year to units of the DNR and another $10,000 worth of lumber is sold each year to other units of government.During the 1950s and 1960s, outdoor recreation became more important on the forest. Camping and picnic areas were developed. Access to the area for hunters, fishers and other outdoor recreationists was improved. Trail systems were extended to accommodate horses and hikers. For a time, there was a trail ride concession where visitors could rent horses to ride.

The entire forest is open to hunting (except for campgrounds), hiking and cross country skiing. However, designated hiking trails are maintained only on the Paint Creek Unit and designated cross country ski trails are maintained only on the Paint Creek and Luster Heights Units.China’s Huang He (Yellow River) is the most sediment-filled river on Earth. Flowing northeast to the Bo Hai Sea from the Bayan Har Mountains, the Yellow River crosses a plateau blanketed with up to 300 meters (980 feet) of fine, wind-blown soil. The soil is easily eroded, and millions of tons of it are carried away by the river every year. Some of it reaches the river’s mouth, where it builds and rebuilds the delta.The Yellow River Delta has wandered up and down several hundred kilometers of coastline over the past two thousand years. Since the mid-nineteenth century, however, the lower reaches of the river and the delta have been extensively engineered to control flooding and to protect coastal development. This sequence of natural-color images from NASA's Landsat satellites shows the delta near the present river mouth at five-year intervals from 1989 to 2009.Between 1989 and 1995, the delta became longer and narrower along a southeast-bending arc. 

In 1996, however, Chinese engineers blocked the main channel and forced the river to veer northeast. By 1999, erosion and settling along the old channel caused the tip of the delta to retreat, while a new peninsula had formed to the north.The new peninsula thickened in the next five-year interval, and what appears to be aquaculture (dark-colored rectangles) expanded significantly in areas south of the river as of 2004. By 2009, the shoreline northwest of the new river mouth had filled in considerably. This may be the outcome that the engineers were anxious to achieve: the land northwest of the newly fortified shoreline is home to an extensive field of oil and gas wells. Their protection is a primary concern.Although levees, jetties, and seawalls allow officials to slow erosion and direct the flow of the river, other challenges to protecting the delta’s natural wetlands and its agricultural and industrial development remain. Water and sediment flows to the delta have declined dramatically since the 1970s, due to both reduced rainfall and explosive urban and agricultural demand for water upstream. In the 1990s, the river frequently ran dry well before reaching the delta.These low- and no-flow periods are a huge problem in the lower reaches of the river and the delta. They severely damage wetlands and aquaculture and worsen the river’s already severe water pollution problem. Ironically, they also increase the flood risk because when flows are low, sediment fills in the riverbed. The river becomes shallower and higher in elevation. In places, the river is already perched above the surrounding floodplain by as much as 10 meters (30 feet). A levee breach during a high water event could be devastating.