A proposal to scale up Telangana’s Four Waters Concept puts a long-running weakness in drought management under scrutiny: whether water stress should be treated mainly as a crisis requiring relief, or as a watershed problem that can be addressed before farms and communities reach that point. Marri Shashidhar Reddy, former vice-chairman of the National Disaster Management Authority, has argued that the model could improve groundwater availability, reduce soil erosion and help rain-fed areas secure water for three crops a year, including during drought conditions.
Speaking to the media, Reddy linked the need for a longer-term approach to the recurring nature of El Niño and the way its effects can be compounded by climate change. His argument, as reported by the Times of India, is not that drought relief is unnecessary, but that repeated relief spending should be supplemented by a system that retains more water within the watershed and reduces exposure to rainfall deficits.
The Four Waters Concept was developed by irrigation expert T Hanumantha Rao and follows a ridge-to-valley approach. According to Reddy, the model combines 10 earthworks with four vegetative measures across watersheds. Its central logic is to intervene across the landscape rather than rely on a single water-storage structure or a late response after crops and drinking-water sources have already been affected.
That makes the proposal relevant to more than agricultural productivity. A watershed determines how rainfall moves across slopes, soil and streams. Measures that slow runoff can potentially increase infiltration, reduce erosion and support stream flows. Reddy said these were among the benefits of the Four Waters approach, along with improved groundwater levels and lower dependence on drought relief. The report does not provide independent measurements for each claimed benefit, but it identifies the specific outcomes that proponents believe the model can deliver.
The model’s institutional history is also important. Reddy said it had produced results in rain-fed areas but remained largely under-used despite several government programmes focused on water conservation. This points to an implementation question rather than a lack of policy language: water conservation may be included in multiple programmes, while the integrated ridge-to-valley approach is not adopted at the scale required across entire watersheds.
## Four Waters Concept and the scale question
Reddy said the approach was first implemented in villages in Telangana and Rayalaseema in 2001, at a cost of about ₹5,000 per acre at that time. He cited Gottigaripalli village in Sangareddy district as an example, saying it remained unaffected by consecutive droughts in 2014 and 2015 and continued to secure water for three crops annually with minimal maintenance.
That example is central to the case being made for the model, but it also shows why scale matters. A village-level success can demonstrate that a method is feasible, yet drought resilience across a district or state requires coordination over land contours, drainage lines, farms, common land and local institutions. The supplied report does not establish how many villages have adopted the model, the total area treated, or whether the reported outcomes at Gottigaripalli have been independently evaluated. Those gaps would have to be addressed before the example could serve as proof of statewide performance.
The reported cost has also changed. Reddy estimated that implementing the model now would cost around ₹15,000 per acre. That is three times the approximate cost cited for the initial implementation in 2001, although the report does not explain how much of the increase reflects inflation, changes in construction standards, land conditions, labour costs or the scope of works included. Any state-level adoption would therefore require a clear costing framework and a way to compare capital expenditure with avoided drought-relief costs.
Reddy said the model required a minimum average annual rainfall of about 500 mm. He also noted that several drought-affected states receive between 650 mm and 1,200 mm annually. His point is that drought exposure cannot be judged only by total annual rainfall. The timing of rainfall, the ability of soil and water systems to retain it, and the demand placed on groundwater and irrigation supplies also shape whether farms remain productive during a dry period.
This distinction is significant for Telangana. A rainfall deficit can create uncertainty for farmers even where the long-term annual rainfall total appears sufficient. If intense or poorly distributed rainfall leaves a landscape quickly through runoff, the same area may later experience depleted soil moisture, falling groundwater levels and weak stream flows. The Four Waters proposal addresses that chain through landscape-level conservation, according to its advocate, rather than through emergency measures alone.
## From drought relief to water governance
The proposal also raises questions about administrative responsibility. A watershed does not necessarily follow village, mandal or district boundaries. Implementing a ridge-to-valley plan may therefore require departments responsible for irrigation, rural development, agriculture, soil conservation and local governance to work from a common map and sequence of interventions. The supplied report does not identify a new coordinating authority or a proposed funding mechanism, but the need for such coordination follows from the geography of the model described.
Reddy said the approach had also been implemented in Rajasthan between 2014 and 2018. The reference suggests that the model is not being presented solely as a Telangana intervention. At the same time, the report provides no comparative data from Rajasthan on groundwater recovery, crop output, maintenance costs or drought performance. The Rajasthan experience therefore functions as evidence of wider application in the account, not as a quantified benchmark.
The proposal sits alongside, rather than automatically replacing, existing government water-conservation programmes. Reddy’s criticism is that the Four Waters model has remained under-utilised despite those programmes. This distinction matters because the policy challenge may be less about creating another scheme and more about aligning existing expenditure with a complete watershed treatment strategy. Without information on programme design, funding flows and implementation outcomes, it is not possible to determine whether the barrier is financial, institutional, technical or administrative.
The financial argument is equally broad. Reddy said the model could reduce dependence on expensive river-linking and inter-basin water-transfer projects. Such projects address water distribution between regions, while watershed treatment seeks to retain and manage rainfall where it lands. They operate at different scales and solve different parts of the water system. The report does not provide a cost comparison, so the claim should be understood as a call to prioritise local water retention before committing to larger transfer infrastructure, not as evidence that one approach can replace the other.
## The missing evidence for statewide adoption
The strongest evidence presented in the report is a combination of an identifiable technical design, past implementation claims and one named village example. The weakest part is the absence of a larger performance dataset. There are no figures on the number of acres treated, groundwater levels before and after intervention, crop yields, stream-flow duration, maintenance expenditure or the number of households benefiting.
Those measures would be essential for evaluating drought-proofing as a public policy. Three crops a year, for example, is a specific outcome but could depend on crop choice, irrigation access, soil quality, rainfall distribution and farm-level investment in addition to watershed works. Similarly, a claim that a village remained unaffected by drought requires a defined measure of impact: whether it refers to drinking water, groundwater, crop production, livestock, household income or all of these.
The absence of these details does not invalidate the proposal. It does mean that a decision to scale it up should distinguish between the model’s design principles and the results attributed to particular sites. A credible expansion would need baseline surveys, transparent selection of watersheds, public cost data and monitoring over multiple rainfall cycles. The supplied report does not say that such a framework has been announced.
Reddy also connected watershed-based conservation to distress migration. The logic is that more reliable local water could support farm activity and reduce the need for households to leave in search of work. That is a significant livelihood claim, but the report provides no migration data or assessment of how much water security alone influences migration decisions. It remains an outcome requiring evidence rather than an established result of the model.
The larger urban question is easy to miss because the immediate subject is rural water management. Telangana’s cities and towns depend on wider regional water systems, while drought affects food production, household incomes and movement between rural and urban areas. If rainfall deficits increase pressure on farms, the effects can appear elsewhere as demand for relief, migration and competition for water. Conversely, stronger watershed management could help stabilise the rural systems on which urban regions are connected, although the supplied material does not quantify that relationship.
The Four Waters Concept therefore deserves attention as a governance and implementation question, not merely as a technical recommendation. The evidence supplied confirms that a former NDMA vice-chairman is urging Telangana to adopt the approach at scale, identifies its ridge-to-valley design, records its claimed rainfall threshold and cost, and cites past implementation examples. What remains unestablished is the scale of verified benefits, the institutional mechanism for statewide adoption and the comparative cost of watershed treatment against drought relief or larger water-transfer projects. Those are the tests that will determine whether the concept moves from an under-used method to a durable drought-management strategy.
