Sustainable Groundwater Management in the North China Plain

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Episode released on May 21, 2026 
Episode recorded on March 12, 2026

Wolfgang KinzelbachWolfgang Kinzelbach talks about strategies for groundwater recovery from overexploitation in the North China Plain. 

Wolfgang Kinzelbach is a Professor Emeritus of Hydromechanics at the Swiss Federal Institute of Technology (ETH) in Zurich (Switzerland). His research focused on many aspects of hydrogeology, including modeling and monitoring of water quantity and quality. This podcast focuses on his work in China, including the North China Plain and the Tarim Basin.

Highlights | Transcript

  1. Wolfgang published a book with co-authors in 2021 titled “Groundwater Overexploitation in the North China Plain: A Path to Sustainability” (Fig. 1).
  2. The North China Plain is surrounded by mountains in the north (Yan Mtns.) and west (Taihang Mtns.), Yellow River to the south, and Bohai Sea to the east (Fig. 2).
  3. The North China Plain is a global hotspot of groundwater depletion. Groundwater depletion reached extreme levels—declines of up to ~1 m/year in some areas since the 1980s (Fig. 3) and ~4–8 km³/year declines depending on the period in some regions (Fig. 4). Declines are also evident in land subsidence.
  4. Shift from surface water to groundwater irrigation: historically, irrigation relied on surface water, which caused waterlogging and salinization. Electrification (≥1950s) enabled widespread groundwater pumping, solving waterlogging but leading to overexploitation. This illustrates a classic “overcorrection” in water management.
  5. Cropping patterns drive depletion: double cropping—winter wheat and summer maize—is central. Winter wheat (grown in the dry season) requires 3–4 irrigations, making it the primary driver of groundwater depletion, whereas summer maize largely depends on rainfall.
  6. Aquifers act as long-term storage (“savings accounts”) compared to surface reservoirs (“checking accounts”). Maintaining groundwater reserves is essential for resilience to drought and climate variability.
  7. Complexity of aquifer systems (shallow vs. deep): the NCP contains shallow (phreatic) and deep confined aquifers. The shallow aquifer supplies irrigation water but is saline (>1 g/l TDS), while the deeper aquifer is fresh and provides drinking water. Despite lower pumping, the deep aquifer shows greater drawdown due to lower storage capacity.
  8. Socioeconomic constraints: smallholder farming: Farms are extremely small (≤~0.3 ha, ~1 acre), limiting profitability. Younger generations leave agriculture, leading to aging farmers and structural shifts toward larger, consolidated farms.
  9. Transition toward modern, technology-driven agriculture: future farming is moving toward larger, mechanized, and data-driven systems (e.g., drones, sensors, precision irrigation). Farmers will increasingly resemble engineers, optimizing inputs and efficiency. This process will probably make farming more attractive for young people.
  10. Monitoring groundwater use: innovation and challenges. Direct smart metering failed due to maintenance and cost issues. A key innovation was using electricity consumption as a proxy for pumping, calibrated with field tests. This enabled large-scale estimation of groundwater withdrawals that was originally deployed in Guantao and later expanded to the whole of Hebei province.
  11. Policy experiments and incentives for water savings: China implemented pilot policies, including:
  • Subsidies to stop growing winter wheat 
  • Payments upfront to cover water fees with savings retained by farmers 
  • Satellite monitoring to verify compliance 
    “Societal experiments” tested what works before scaling policies. 
     
  1. Multiple drivers of groundwater recovery: recent groundwater recovery in shallow aquifers and slowing or zero decline of heads in deep aquifers is attributed to:
  • South–North Water Transfer (reducing groundwater use for households and industries)
  • Agricultural policy changes and reduced irrigation
  • Favorable rainfall 
    Each contributed roughly one-third to improvements. 
  1. Managed aquifer recharge and infrastructure tradeoffs. Recharge strategies include infiltration basins (Fig. 6) and diverting water into riverbeds (Fig. 7). Infiltration basins enhance groundwater replenishment but reduce cultivated land, creating tradeoffs between water sustainability and food production.
  2. Emerging water quality risks: rising water tables create hydraulic gradients that may push saline water from the shallow aquifer into the deeper drinking-water aquifers. This highlights a shift from quantity problems to future water quality challenges.
  3. Greenhouses: China accounts for ~60% of global greenhouses (Fig. 8, Tong et al., Nature Food, 2024) which allow intensification of water use: Although greenhouses reduce evaporation, they enable multiple cropping cycles (beyond double cropping). They usually employ drip irrigation systems. While increasing “crop-per-drop” considerably they also increase total water demand per acre. They are a surprising new contributor to year-round groundwater use.
  4. Save the Water (StW) board game was designed to work with farmers and assess different options for managing water resources in the North China Plain (Fig. 9).
  5. Yanqi Basin, NW China (Fig. 10): represents contrasting but related challenges. Irrigation caused water table rise, phreatic evaporation, and salinization. Groundwater use solved the salinization problem but led to overexploitation. Expansion of irrigated land (rather than intensification) is the key sustainability challenge in this region. Farm size is much larger than in the North China Plain and many farms are state owned. There is a lot of room for expansion of irrigation, unlike in the North China Plain. The hotspot of groundwater overexploitation in China has shifted from the North China Plain to China’s West.
  6. Key insight: no “one-size-fits-all” solution: Effective groundwater management requires a portfolio of approaches—policy, infrastructure, incentives, and monitoring. The system must be adaptive and region-specific rather than relying on a single solution.
  7. The case of the North China Plain shows that large-scale groundwater depletion can be reversed, but only through integrated approaches combining policy, technology, monitoring, and stakeholder engagement—with new challenges (especially water quality) emerging as systems recover. It is not easily replicated in governance systems different from the Chinese one.
  8. Water quantity issues in the North China Plain are not expected in the future with projected population decline from 1.4 billion (2025) to 0.6 billion (2100) (UN Medium projection) (Fig. 11).
Book published by Wolfgang Kinzelbach and co-authors in 2021
Figure 1. Book published by Wolfgang Kinzelbach and co-authors in 2021. (link)
Digital Elevation Model of North China Plain (Zhang et al., Nature Sci. Rept., 2020)
Figure 2. Digital Elevation Model of North China Plain (Zhang et al., Nature Sci. Rept., 2020) (link).
Typical example of groundwater level declines of ~1 m/yr in the late 1990s in Rongcheng County (Hebei Province)
Figure 3. Typical example of groundwater level declines of ~1 m/yr in the late 1990s in Rongcheng County (Hebei Province) (Kinzelbach et al., 2022).

 

Observed groundwater levels in the North China Plain in 2019 in the shallow aquifer (left) and deep aquifer (right)
Figure 4. Observed groundwater levels in the North China Plain in 2019 in the shallow aquifer (left) and deep aquifer (right) (Kinzelbach et al., 2022). 
Wolfgang Kinzelbach answering questions from the local farmers during the installation of RSA meters by technicians from RSA and local DWR (Kinzelbach et al., 2022)
Figure 5. Wolfgang Kinzelbach answering questions from the local farmers during the installation of RSA meters by technicians from RSA and local DWR (Kinzelbach et al., 2022).
Infiltration basin in Guantao County with water depth gauge (left) and floating evaporation pan (upper right) to measure evaporative losses
Figure 6. Infiltration basin in Guantao County with water depth gauge (left) and floating evaporationpan (upper right) to measure evaporative losses. A satellite image (bottom right) shows the extent of the infiltration pond, which is called “Moon Lake” (Kinzelbach et al., 2022). 
Infiltration in river bed: Example Fuyang River, Hebei
Figure 7. Infiltration in river bed: Example Fuyang River, Hebei. Response of groundwater table towater release from South–North Transfer Central Route. Three blue tones showing rising water table up to 2, 5, and 15 m (Kinzelbach et al., 2022).
NASA images of land use May 7, 1987 (left) and recent image May 20, 2024 (right) showing widespread expansion of greenhouses in Weifang Prefecture over this time
Figure 8. NASA images of land use May 7, 1987 (left) and recent image May 20, 2024 (right) showing widespread expansion of greenhouses in Weifang Prefecture over this time. (Link)
“Save the Water” (StW) board game (top) and user interface of the corresponding digital game
Figure 9. “Save the Water” (StW) board game (top) and user interface of the corresponding digital game. https://savethewater-game.com/game/
Yanqi Basin, a subbasin of the Tarim Basin, Xinjiang, China
Figure 10. Yanqi Basin, a subbasin of the Tarim Basin, Xinjiang, China (N. Li, et al., 2015) http://dx.doi.org/10.1016/j.jhydrol.2015.07.024
Projected population growth in major countries and continents showing reduction in population in China from 1.4 billion (2025) to 0.6 billion in 2100 (UN medium range projection).
Figure 11. Projected population growth in major countries and continents showing reduction in population in China from 1.4 billion (2025) to 0.6 billion in 2100 (UN medium range projection).

 

 

 

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